Page 22 (3/04)
Designations: Replace second paragraph with [See above: Page 21, E.T. Handicap Racing, Introduction]

Page 27 (3/04)
Data Recorder: Replace first sentence with [See above: Page 21, E.T. Handicap Racing, Introduction]

Page 29 (3/04)
Designations: Replace second paragraph with [See above: Page 21, E.T. Handicap Racing, Introduction]

Page 32 (3/04)
Designations: Replace second paragraph with [See above: Page 21, E.T. Handicap Racing, Introduction]

Page 36 (3/04)
Designations: Replace second paragraph with [See above: Page 21, E.T. Handicap Racing, Introduction]

Page 40 (3/04)
Designations: Replace first paragraph on page with [See above: Page 21, E.T. Handicap Racing, Introduction]

Class Weight Breaks: Delete class weight break "X - 27.50 or more" and add "AF - 16.00 to 17.49; BF - 17.50 to 18.99; CF - 19.00 to 24.99; DF - 25.00 or more."

Class Weight Breaks: Second paragraph, add new fourth sentence, "Front-wheel drive - standard transmission vehicles must add 100 pounds to class minimum

Page 59 (2/04)
Radiator: Replace sentence with "Full-size stock radiator mandatory for year/body type used."

Page 64 (7/04)
Computer/Data Recorders: Add new second sentence, "Data recorders permitted."

Page 65 (4/04)
Designations: Change first sentence in second paragraph with "Reserved for electronic-fuel-injected, computer-controlled rear-wheel drive automobiles only."

Page 65 (1/04)
Class Weight Breaks: Add to end of section "Class L restricted to 4 or 6 cylinder cars only. Class M restricted to 4-cylinder cars only."

Page 76 (2/04)
Engine: Add new fifth sentence "Truck engines prohibited."

Page 85 (3/04)
Weight: Add to end of first sentence, "; may be under posted minimum weight."

Page 86 (4/04)
Cylinder Heads: Replace second sentence with, "Effective 4/20/04, cylinder head must be or have been commercially available over the counter from the OEM source and must conform to specifications as provided to NHRA by the OEM manufacturer with year and model optional. NHRA may use a cylinder head provided by the respective manufacturer to determine whether a cylinder head conforms to the specifications.

Replace third sentence with, "Any size valves permitted. Valve guide must be in stock location and angle as cast in OEM cylinder head. Spark plug holes must remain in the approved location. Angle milling permitted."

Page 86 (4/04)
Cylinder Heads: Replace second sentence with, "Effective 4/20/04, cylinder head must be commercially available over the counter from the OEM source and must conform to specifications as provided to NHRA by the OEM manufacturer with year and model optional. NHRA may use a cylinder head provided by the respective manufacturer to determine whether a cylinder head conforms to the specifications.

Replace third sentence with, "Any size valves permitted. Valve guide must be in stock location and angle as cast in OEM cylinder head. Spark plug holes must remain in the approved location. Angle milling permitted."

Page 88 (2/04)
Wheelbase: Replace second sentence with "Minimum 96 inches.

Page 101 (7/04)
Carburetors: Replace third sentence with "D/ED, E/ED, F/ED, and G/ED: any standard OEM carburetor(s) permitted. Carb manufacturer must be represented in NHRA Blueprint Bulletins."

Page 102 (3/04)
Cylinder Heads: Add new second sentence with, "Effective 4/1/04, cylinder head must be or have been commercially available over the counter from the OEM source and must conform to specifications as provided to NHRA by the OEM manufacturer. NHRA may use a cylinder head provided by the respective manufacturer to determine whether a cylinder head conforms to the specifications. A/ED: hemi, canted-valve, splay-valve, or wedge head permitted."

Replace fourth sentence with, "Any size valves permitted. Valve guide must be in stock location and angle as cast in OEM cylinder head. Spark plug holes must remain in the approved location. Angle milling permitted."

Page 111 (1/04)
Cylinder Heads, Altereds: Replace first two sentences with "Any type 2-valve head permitted in A through D and J; V-8 splayed valve prohibited in E through G."

Page 111 (3/04)
Cylinder Heads, Street Roadsters: [see above: Page 102, Comp, Cylinder Heads] Add to section, "Splay-valve head prohibited."

Page 114 (6/04) Transmission: Add new eighth sentence, "BRT drive unit and transbrake are permitted as manufactured; no additional wiring or plumbing permitted."

Page 114 (6/04)
Body, Full-bodied Cars: Replace fourth sentence with "Maximum front-end overhang is 45 inches or OEM +/- 1 inch for all 2001 and newer cars. All 2000 and older vehicles must retain stock overhang +/- 1 inch."

Page 119 (6/04)
Transmission: Add to end of section, "BRT drive unit and transbrake are permitted as manufactured; no additional wiring or plumbing permitted."

Page 124 (7/04)
Carburetors: Replace fourth sentence with "F/EA, and G/EA: any standard OEM carburetor(s) permitted. Carb manufacturer must be represented in NHRA Blueprint Bulletins."

Page 124 (3/04) Carburetors: Add new sixth sentence, "Weber or Weber-type carburetor restricted to 55mm Weber or equivalent."

Page 125 (3/04)
Cylinder Heads: [see above: Page 102, Comp, Cylinder Heads] Add to section, "Class A; hemi, canted-valve, splay-valve, or wedge head permitted."

Page 127 (6/04)
Body, Full-bodied Cars: Replace fourth sentence with "Maximum front-end overhang is 45 inches or OEM +/- 1 inch for all 2001 and newer cars. All 2000 and older vehicles must retain stock overhang +/- 1 inch."

Page 131 (3/04)
Cylinder Heads: [see above: Page 102, Comp, Cylinder Heads]

Page 132 (6/04)
Transmission, Manual: Add to end of section, "BRT drive unit and transbrake are permitted as manufactured; no additional wiring or plumbing permitted."

Page 139 (6/04)
Transmission: Add to end of section, "BRT drive unit and transbrake are permitted as manufactured; no additional wiring or plumbing permitted."

Page 144 (4/04)
Engine: Replace second paragraph with "Only those engine combinations that utilize cylinder blocks and head designs that were in NHRA competition prior to April 1, 2001, will be accepted for NHRA competition. Any modifications or alterations to cylinder blocks and head designs used prior to April 1, 2001, other than those listed below, will be deemed to be a change in design and therefore prohibited. Engine combinations that do not meet the following criteria but were used in NHRA competition in 2003 will be accepted through the 2004 season only. For a complete list of cylinder blocks and head designs that are allowed in NHRA competition, contact the NHRA technical department: phone, (626) 914-4761; fax, (626) 914-7551.

Vent Tube Breathers: Add to end of section, "Oil pan/crankcase/valley vacuum systems, of any description, are prohibited."

All engine combinations must adhere to the following criteria:

1. Maintain interchangeability of existing parts (i.e., cranks, cams, manifolds, valve covers, rocker assemblies, etc.)
2. Maintain original bore center variance of +/- .015-inch
3. Maintain maximum camshaft-to-crankshaft centerline variance of +/- .015-inch as used prior to April 1, 2001
4. Valves can be any size as long as they maintain intake and exhaust valve-angle variance of +/- 1 degree
5. Maintain general combustion-chamber configuration (e.g., Hemi, canted valve). Fuel injection directly into cylinder prohibited
6. Maintain original cylinder orientation in reference to centerline of crankshaft
7. Maintain valve-guide location, lateral and front to back, variance of +/- .015-inch
8. Maintain lifter-bore location, lateral and front to back, variance of +/- .015-inch
9. Maintain maximum and minimum (+/- .015-inch) engine-block deck-to-crankshaft centerline dimension as used prior to April 1, 2001
10. Retain cylinder head, timing cover, intake manifold, exhaust manifold, valve-cover bolt pattern; additional bolts/studs/dowels may be used
11. Retain as cast/forged minimum block wall and web/rib thickness"

Page 144 (2/04)
Fuel System: Add to end of section, "See General Regulations 1:5 and 1:8-A."

Page 145 (1/04)
Supercharger: Replace first paragraph with "Maximum overdrive limits are 2.15 PSI and 1.70 Roots."

Page 146 (2/04)
Transmission: Add new second paragraph, "The use of a transmission consisting of an aftermarket torque converter and an aftermarket planetary transmission (three speed maximum) with an electric-only transbrake is permitted for the supercharged-methanol combinations only. The unit must be NHRA-accepted. The use of a delay box/device is prohibited. The use of any automated rpm-control device during the staging/launching process is prohibited. An aftermarket SFI 29.1 flexplate (with no starter ring gear) or a solid steel converter driveplate, a SFI 6.1, 6.2, or 6.3 titanium flywheel shield, and an aftermarket SFI 4.1 one-piece transmission shield (covering the transmission units and the reverser) are required."

Page 151 (2/04)
Transmission: [See above: Page 146, Top Alcohol Dragster, Transmission]

Page 153 (11/03)
Firewall: Add new second sentence, "Portion of the firewall between skin of the body and the chassis can be no higher than 12 inches, as measured from the bottom of the rocker panel to the bottom of the firewall."

Page 156 (1/04)
Engine: Add new 10th sentence "Maximum allowable cylinder offset for Harley-Davidson engine and the NHRA-accepted American pushrod V-twin engine is one inch."

Minimum weight requirements have been developed for the following engine components:

Piston - 460 grams
Wrist pin - 135 grams
Connecting rod - 480 grams
Intake valve - 90 grams
Exhaust valve - 80 grams

Material for intake and exhaust pushrod, and valve spring are limited to steel. All other materials prohibited. Roller bearings limited to cam bearings, cam thrust bearings, lifters, and rocker arm fulcrum and valve spring tip. Conventional sleeve rod and main bearing mandatory."

Page 164 (11/03)
Wheels: Replace first sentence with "Effective Jan. 1, 2004, all Pro Stock wheels must meet a minimum SFI Spec 15.1, measure 16x16 inches, and be of a beadlock design. Any SFI Spec wheel must be used in an unaltered manner consistent with the manufacturer's installation and instruction books unless otherwise approved.

Page 164 (2/04)
Body: Replace 10th paragraph with "Width over front spindle - plus or minus 1 inch from stock or 67 inches, whichever is less. Width in front of front tires (including trim) - plus or minus 1 inch from stock or 64.375 inches, whichever is less. All other measurements must remain plus or minus 1 inch as found on the NHRA Pro Stock Body Measurement Legend."

Add new second paragraph, "Ground effects of any description prohibited. Ground effects include but are not limited to rocker skirts, belly pans, sheet-metal work to the under side of the car that produces a "tunnel" for the passage of air, etc. Final determination on all body modifications rests with NHRA Technical Services Department."

Page 165 (11/03)
Spoilers: Replace third sentence of second paragraph with "Mandatory height of spill plate 6 inches (+/- 1/8-inch variance); must be attached to spoiler so that a mandatory 1 inch (+/- 1/8-inch variance) extends above edge of spoiler; must be vertical to the spoiler.

Page 166 (3/04)
Ignition: Replace first two sentences with "Effective March 15, 2004, the MSD 7530T ignition system will be the only accepted unit for NHRA competition. All other ignition systems are prohibited."

Page 168 (5/04)
Engine: Add to end of second paragraph, "Effective 01/01/2005, the use of cast engine blocks prohibited."

In third paragraph, replace first sentence with "Effective 04/01/20004, Dry-sump oil system mandatory."

Add new paragraph to end of section, "Top Fuel and Funny Car major engine component development, prior to June 11, 2003, is permitted. The moratorium includes, but is not limited to, engine blocks, cylinder heads, intake manifolds, and superchargers. This includes any redesign, reconfiguration, and/or significant modifications to existing components. Refer any development, redesign, reconfiguration, and/or modification questions with respect to major Top Fuel and Funny Car engine components to the NHRA Technical Department for resolution."

Page 169 (2/04)
Fuel System: Add to end of section, "See General Regulations 1:8-A."

Page 169 (6/04)
Supercharger: Replace second sentence with "Maximum size: 14-71, 19-inch rotor length, 11 1/4-inch case width; …"

Page 173 (11/03)
Body: In second paragraph, replace last sentence with "The framing must be a permanent fixture, with the exception of vertical mounts can be adjustable for necessary vertical body positioning.

Page 174 (6/04)
Spoilers: Add new second paragraph, "Effective 7/15/2004, spoiler surface, front and rear, must be a continuos single-curved plane. Any lips, notches, decks, or steps prohibited in the spoiler surface, except for wickers, as currently allowed. Spillplates must consist of vertical planes running parallel to the car. A maximum of two additional supports (ribs or plates) will be allowed anywhere between the spillplates, as long as they are in the vertical plane, running parallel to the spill plates."

Page 175 (3/04)
Ignition Systems: Add to end of first paragraph, "Effective April 30, 2004, the MSD Pro Mag Digital Retard Control (part no. 8971) and Graphic Editor (part no. 7570) will be accepted for NHRA competition."

Page 178 (6/04)
Supercharger: Replace second sentence with "Maximum size: 14-71, 19-inch rotor length, 11 1/4-inch case width; …"

Page 180 (6/04)
Suspension: Add new second sentence, "Effective 1/1/2005, steel front spindle mandatory. Minimum 4130 steel. All other materials prohibited."

Page 180 (7/01)
Deflector Plate: Add to new second paragraph, "Effective 7/1/2004, all vehicles competing in Top Fuel must have a rear roll cage shroud. The shroud must be constructed from .090-inch titanium and must be shaped to conform to the roll cage. The shroud must be attached to each of the sidebars with a minimum of three 5/16-inch Grade 8 bolts per side, and to the rear bars with a minimum two 5/16-inch Grade 8 bolts."

Page 182 (3/04)
Ignition Systems: [See above: Page 175, Funny Car, Ignition Systems]

Page 190 (5/04)
Engine: Replace fifth sentence with "Crankshaft centerline must not exceed 24 inches from ground in any class, except trucks. Maximum height 36 inches for trucks running 12.00 and slower; 31 inches for trucks running 11.99 to 10.00; and 24 inches for trucks 9.99 seconds and quicker."

Page 192 (1/04)
Lines: Add to end of second-to-last sentence "Fragola Performance System Series 8000 Push-Lite Race Hose."

Page 192 (7/04)
Fuel/Air: Delete from first sentence reference to "ice." Add to end of section, "Spraying of intake with any artificial spray or coolant prohibited."

Page 194 (2/04)
1:8-A Nitromethane: Add new section, "Only nitromethane from an NHRA accepted supplier may be brought on site or used on site at any NHRA POWERade Drag Racing Series event ("NHRA National Event") or NHRA Lucas Oil Drag Racing Series event ("NHRA Divisional Event"). NHRA will designate accepted suppliers of nitromethane that may be brought on site and/or used on site at NHRA National Events and NHRA Divisional Events. To be eligible for competition, fuel teams must use nitromethane from one of the accepted suppliers. All nitromethane will continue to be required to contain a marker that changes color when the nitromethane has been sensitized or contaminated; no clear nitromethane will be allowed. Fuel, whether in the vehicle or otherwise, as well as transporters and pit areas, will be checked for compliance with this rule as deemed appropriate by NHRA. Any participant who violates any rule regarding nitromethane shall be banned from competition at the applicable event, or shall be subject to such other penalty deemed appropriate by NHRA."

Page 194 (1/04)
Supercharger: Remove all reference to Whipple supercharger in section

Page 197 (5/04)
Flywheel Shield & Motor plate: General: Replace first sentence of fourth paragraph with "For cars equipped with a SFI 7.1 lower engine ballistic/restraint device a maximum of two holes, each no larger than 2-inches in diameter (or 3.14 square inches equivalent area) are permitted. The holes must be located entirely below the horizontal centerline of the crankshaft. The holes must be at least 0.5 inches from any bellhousing bolt hole and be separated by at least two inches."

Page 197 (11/03)
Flywheel Shield Top Fuel, Funny Car: Add new last sentence to second paragraph, "The opening in the motor plate to accommodate the crankshaft flange cannot exceed 7.000 inches."

Page 201 (3/04)
Steering: Add to end of paragraph, "NHRA-accepted swing-away steering column permitted with removable steering wheel."

Page 203 (7/04)
Deflector Plate: [See above: Page 180, Top Fuel, Deflector Plate]

Page 216 (5/04)
Hood Scoop: Replace third sentence with, "Scoop may have one opening only in Professional categories, and Top Alcohol Dragster, Top Alcohol Funny Car, Comp, and Super Stock. All other classes, multiple scoop openings permitted."

Page 226 (5/04)
Protective Clothing: In fifth paragraph in the first sentence add after nitrous oxide "methanol"
In sixth paragraph, replace first sentence with "All driver are required to wear full-length pants, shoes, and socks."

Page 228 (5/04)
Qualifying: Replace first paragraph with "To constitute an official qualifying attempt, all cars must self-start and self-stage. At NHRA POWERade Drag Racing Series, Lucas Oil Drag Racing Series, and Summit Racing Finals, a contestant cannot drive more than one car in the same category at the same event, nor can one vehicle be use for multiple entries. Multiple driver restriction for E.T. classes, at NHRA Member Track events, may vary based on specific member track E.T. regulations. Racers are advised to contact the respective division office or member track for regulations within that geographic area. Vehicles must remain in the same category entered, with one registered driver for the duration of the event."

Page 242 (05/04)
Section 19, Administration Procedures and Appeals: Replace third full paragraph (page 243) with the following: For purposes of this Rulebook, the term "participant" shall include officials, any person possessing or who has been issued a credential, and any person directly or indirectly associated with any vehicle that has been permitted to enter an event site for the purpose of competition, including, but not limited to, owners, drivers, and crewpersons. The term "participant" shall, as needed for effective enforcement of the Rulebook, include any person or entity that has any ownership interest in a race team or otherwise is a "participant" and, as to any such entity, each of the entity's owners, principals, agents, parents, subsidiaries, divisions, partners, affiliates and other related persons or entities.

Page 243 (05/04)
Section 19: Add after Participant Conduct heading and first paragraph: Notwithstanding any other provision of this Rulebook, by participating in, and in consideration for being allowed to participate in events, and in consideration of receiving the numerous benefits available to participants, each participant agrees that:

1. Participation in any and every aspect of the sport of drag racing is a privilege, not a right.
2. The participant voluntarily chooses to participate in accordance with the NHRA Rulebook.
3. The participant will not initiate or maintain, directly or indirectly, any kind of civil court litigation related to any NHRA rule or decision, which NHRA determines to be conduct detrimental to NHRA or the sport of drag racing. Factors considered in determining whether a lawsuit shall be deemed conduct detrimental to NHRA or the sport of drag racing include, but are not limited to: the threat posed to maintaining the ability to conduct races and the continued viability of the sport of drag racing; disruption to the orderly conduct of the sport of drag racing; damage to NHRA's business and reputation; loss of sponsorship opportunities; disruptions in sponsor relationships; damage to goodwill with vendors, sponsors, customers and members; damage to racing competition; and other damage to NHRA or the sport of drag racing.
4. In order to preserve the sport of drag racing, and to preserve NHRA's ability to function and exist as a sanctioning body for drag racing, NHRA must rely on the foregoing covenant not to sue.
5. NHRA would be severely damaged by breach of this covenant not to sue.
6. Taking into account the many circumstances affecting the sport of drag racing, and factors that cannot be foreseen and accurately predicted by NHRA and each participant, actual damages to NHRA resulting from breach of the covenant not to sue would be impracticable and extremely difficult to determine.
7. In the event of any breach of this covenant not to sue involving a suit filed after May 1, 2004, unless the participant prevails in its civil court litigation, the participant: