Page 22 (eff 03/16/07)
Minimum Weights: Add “4 valve” after 6 cylinder and Add “6 cylinder 2 valve, max. displacement 3.0 liter: 2,450 pounds”

Page 23 (eff 12/21/06)
Fuel: Add “Gasoline (including E85), diesel, natural gas and propane permitted” after first sentence.

Page 25 (eff 05/23/07)
Street Equipment: Add “and side mirrors” after wipers in first sentence of first paragraph.

Page 25 (eff 05/23/07)
Body:  Add “Air inlet may not extend past the front bumper line” after the first sentence of third paragraph.

Page 27 (eff 05/23/07)
Minimum Weight: Add “FWD 4-cylinder (1 power adder; K-Series): 2600 pounds

                                 Add “FWD 4-cylinder (2 power adder; K-Series): 2700 pounds

Page 27 (eff 07/09/07)

Engine:  Add “Dart block (31496701 and 31496801) accepted.” after second sentence of first paragraph.

Page 28 (eff 09/28/07)
Engine Containment Device: Remove “Both engine diapers and catch pans mandatory for 2008.”

Page 28 (eff 07/09/07)

Supercharger, Turbocharger: Replace first paragraph with the following “Permitted. Restricted to a single turbocharger.  Turbocharger must utilize a turbine housing inlet flange commonly referred to as a T04.  The turbine housing inlet flange may be smaller but may never exceed the T04 dimensions in any direction.  Limited to a maximum 72mm (2.835 inches) turbo where the maximum compressor wheel diameter may not exceed 72.5mm (2.854 inches) measured at the point where the leading edge of the compressor wheel meets the housing; the compressor housing inducer diameter may not exceed 73.75mm (2.904 inches) measured at the point where the leading edge of the compressor wheel meets the housing.  K Series engines limited to a maximum 67.8mm (2.669 inches) where the maximum compressor wheel diameter may not exceed 67.88 mm (2.672 inches) measured at the point where the leading edge of the compressor wheel meets the housing; the compressor housing inducer diameter may not exceed 68.8mm (2.709 inches) measured at the point where the leading edge of the compressor wheel meets the housing  Compressor wheel inducer contours of wheel may not be “stepped, notched, or clipped”; e.g. the contours must be continuous features from the inducer to the wheel exducer.  All air entering the turbocharger must pass through the turbocharger inlet.  Injection of any liquid, gas, or any other substance into the inlet or exhaust housing in prohibited.  Turbocharger compressor wheel must be constructed of cast or billet aluminum.  Exotic materials wheels prohibited.”

Page 28 (eff 05/23/07)
Supercharger, Turbocharger: Replace “where the maximum compressor inducer diameter is 68.8mm” with “where the maximum compressor housing inducer diameter is 68.8mm”housing” in the first paragraph sixth sentence. 

Page 29 (eff 04/05/07)
Transmission, Manual: Add the following part numbers for transmission adapters:
Part#: 26008; Evolution H2B kit w/o mounts
Part#: 26208; Evolution H2B kit with mounts
Part#: 26308; Evolution/Bisimoto kit w/o mounts
Part#: 25208; Evolution/Bisimoto kit with mounts
Part#: 26509; Evolution/Bisimoto H2D kit w/o mounts

Page 29 (eff 03/22/07)
Transmission, Manual: Remove (transmission must be OEM for engine used) and replace with “Transmission must be from same manufacturer, adapter permitted provided adapter plate is approved by NHRA in advance” in first paragraph.

Page 31 (eff 08/14/07)

Body:  Replace first sentence of second paragraph with “Based upon advanced written approval by NHRA, mild customizing and body kits permitted, but must retain full-bodied appearance. Minimum two functional doors required.”

Page 31 (eff 05/23/07)
Street Equipment: Add “and side mirrors” after wipers in first sentence of first paragraph.

Page 37 (eff 05/23/07)
Street Equipment: Add “and side mirrors” after wipers in first sentence of first paragraph.

ALL MOTOR

Page 41 (eff 09/28/07)
Engine Containment Device: Remove “Both engine diapers and catch pans mandatory for 2008.”

Page 41 (eff 12/21/06)
Fuel: Replace first sentence with the following “Methanol, NHRA-accepted ethanol, NHRA accepted racing gasoline, gasoline (including E85) diesel, natural gas and propane permitted”

Page 42 (eff 03/16/07)
Transmission, Manual: Remove “Sequential transmission prohibited” from second sentence of first paragraph

Page 43 (eff 09/28/07)
Wheelie Bars: Replace “Wheelie-bar wheels must spin free at the starting line” with “Wheelie-bar wheels must spin free from the point where your crew has completed their vehicle check (post burn-out) and the pre stage beam.  Any violation of this rule may result in your run being disqualified.”

HOT ROD

Page 47 (eff 07/09/07)

Minimum Weights:  Remove “Aftermarket, replacement, or non-original OEM transmission, manual and automatic: Add 150 pounds with 1 power adder; add 225 pounds with 2 power adders.  Non-original OEM is defined as a transmission that was never coupled with a particular engine in production.” from the third paragraph.

Minimum Weights:  Replace “1 PWR Adder Min Weight (OEM Trans)” with “1 Pwr Adder Min. Weight (OEM trans or fully automatic with converter)” in the Minimum weights chart.

Minimum Weights:  Replace “1 Pwr Adder Min. Weight (non-OEM trans)” with 1 Pwr Adder Min. Weight (non-OEM manual trans)” in the Minimum weights chart.

Minimum Weights:  Replace “2 PWR Adder Min Weight (OEM Trans)” with “2 Pwr Adder Min. Weight (OEM trans or fully automatic with converter)” in the Minimum weights chart.

Minimum Weights:  Replace “2 Pwr Adder Min. Weight (non-OEM trans)” with 2 Pwr Adder Min. Weight (non-OEM manual trans)” in the Minimum weights chart.

Page 48 (eff 09/28/07)
Engine Containment Device: Remove “Both engine diapers and catch pans mandatory for 2008.”

Page 48 (eff 12/21/06)
Fuel: Replace first sentence with the following “Methanol, NHRA-accepted ethanol, NHRA accepted racing gasoline, gasoline (including E85) diesel, natural gas and propane permitted”

Page 49 (eff 07/09/07)

Turbocharger: Replace second paragraph with the following “Ecotec engine limited to a maximum 68mm (2.677 inches) turbo, where the maximum compressor wheel inducer diameter may not exceed 68.5mm (2.697 inches) measured at the point where the leading edge of the compressor wheel meets the housing; the compressor housing inducer diameter may not exceed 69.75 (2.746 inches) measured at the point where the leading edge of the compressor wheel meets the housing.  Compressor wheel inducer contours of wheel may not be “stepped, notched, or clipped”; e.g. the contours must be continuous features from the inducer to the wheel exducer.”

Turbocharger: Replace third paragraph with the following “All other FWD and AWD engine limited to a maximum 74mm (2.913 inches) turbo, where the maximum compressor wheel inducer diameter may not exceed 74.7mm (2.941 inches) measured at the point where the leading edge of the compressor wheel meets the housing; the compressor housing inducer diameter may not exceed 75.85 (2.986 inches) measured at the point where the leading edge of the compressor wheel meets the housing.  Compressor wheel inducer contours of wheel may not be “stepped, notched, or clipped”; e.g. the contours must be continuous features from the inducer to the wheel exducer.”

Page 50 (eff 07/09/07)

Transmission, Automatic:  Remove “Non-original, OEM automatic transmission permitted but will be assessed a weight penalty, see Minimum Weights (Honda engine with a Ford transmission, or Dodge engine with a Dodge transmission that was never coupled with a particular engine in production, etc.)” in the first paragraph.

Page 51 (eff 09/28/07)
Wheelie Bars: Replace “Wheelie-bar wheels must spin free at the starting line” with “Wheelie-bar wheels must spin free from the point where your crew has completed their vehicle check (post burn-out) and the pre stage beam.  Any violation of this rule may result in your run being disqualified.”

Page 54 (eff 05/23/07)
Minimum Weights: Add “4G63 (1 or 2 power adder): 2250 pounds” under “RWD 4-Cylinder, up to 2.4 liter”

Minimum Weights: Add “4G63 (1 or 2 power adder): 2350 pounds” under “RWD 4-Cylinder, 2.41 to 2.5 liter”

Page 54 (eff 09/14/07)

Minimum Weights: Add “4G63 (1 or 2 power adder): 2350 pounds” under “RWD 4-Cylinder, up to 2.4 liter”

Minimum Weights: Add “4G63 (1 or 2 power adder): 2450 pounds” under “RWD 4-Cylinder, 2.41 to 2.5 liter”

Page 55 (eff 09/28/07)
Engine Containment Device: Remove “Both engine diapers and catch pans mandatory for 2008.”

Page 55 (eff 07/09/07)

Turbocharger: Replace second paragraph with the following “Six-cylinder, single-turbo applications limited to a maximum 68mm (2.677 inches) turbo, where the maximum compressor wheel inducer diameter may not exceed 68.5mm (2.697 inches) measured at the point where the leading edge of the compressor wheel meets the housing; the compressor housing inducer diameter may not exceed 69.75 (2.746 inches) measured at the point where the leading edge of the compressor wheel meets the housing.  Compressor wheel inducer contours of wheel may not be “stepped, notched, or clipped”; e.g. the contours must be continuous features from the inducer to the wheel exducer.  All air entering the turbocharger must pass through the turbocharger inlet.  Injection of any liquid, gas, or any other substance into the inlet or exhaust housing in prohibited.  Turbocharger compressor wheel must be constructed of cast or billet aluminum.  Exotic materials wheels prohibited.”    

Turbocharger: Insert the following paragraph “Ecotec, single-turbo applications limited to a maximum 74mm (2.913 inches) turbo, where the maximum compressor wheel inducer diameter may not exceed 74.5mm (2.933 inches) measured at the point where the leading edge of the compressor wheel meets the housing; the compressor housing inducer diameter may not exceed 75.75 (2.982 inches) measured at the point where the leading edge of the compressor wheel meets the housing.  Compressor wheel inducer contours of wheel may not be “stepped, notched, or clipped”; e.g. the contours must be continuous features from the inducer to the wheel exducer.  All air entering the turbocharger must pass through the turbocharger inlet.  Injection of any liquid, gas, or any other substance into the inlet or exhaust housing in prohibited.  Turbocharger compressor wheel must be constructed of cast or billet aluminum.  Exotic materials wheels prohibited.”    

Turbocharger: Replace third paragraph with the following “Six-cylinder, twin-turbo applications limited to a maximum 54mm (2.126 inches) turbo, where the maximum compressor wheel inducer diameter may not exceed 54.5mm (2.146 inches) measured at the point where the leading edge of the compressor wheel meets the housing; the compressor housing inducer diameter may not exceed 55.75 (2.195 inches) measured at the point where the leading edge of the compressor wheel meets the housing.  Compressor wheel inducer contours of wheel may not be “stepped, notched, or clipped”; e.g. the contours must be continuous features from the inducer to the wheel exducer.  All air entering the turbocharger must pass through the turbocharger inlet.  Injection of any liquid, gas, or any other substance into the inlet or exhaust housing in prohibited.  Turbocharger compressor wheel must be constructed of cast or billet aluminum.  Exotic materials wheels prohibited.”  

Turbocharger: Replace fourth paragraph with the following “Two-rotor, single-turbo applications limited to a maximum 80mm (3.150 inches) turbo, where the maximum compressor wheel inducer diameter may not exceed 80.5mm (3.169 inches) measured at the point where the leading edge of the compressor wheel meets the housing; the compressor housing inducer diameter may not exceed 81.8mm (3.220 inches) measured at the point where the leading edge of the compressor wheel meets the housing.  Compressor wheel inducer contours of wheel may not be “stepped, notched, or clipped”; e.g. the contours must be continuous features from the inducer to the wheel exducer.  All air entering the turbocharger must pass through the turbocharger inlet.  Injection of any liquid, gas, or any other substance into the inlet or exhaust housing in prohibited.  Turbocharger compressor wheel must be constructed of cast or billet aluminum.  Exotic materials wheels prohibited.”    

Turbocharger: Replace fifth paragraph with the following “Four-cylinder, single-turbo applications limited to a maximum 78mm (3.071 inches) turbo, where the maximum compressor wheel inducer diameter may not exceed 78.5mm (3.091 inches) measured at the point where the leading edge of the compressor wheel meets the housing; the compressor housing inducer diameter may not exceed 79.75 (3.140 inches) measured at the point where the leading edge of the compressor wheel meets the housing.  Compressor wheel inducer contours of wheel may not be “stepped, notched, or clipped”; e.g. the contours must be continuous features from the inducer to the wheel exducer.  All air entering the turbocharger must pass through the turbocharger inlet.  Injection of any liquid, gas, or any other substance into the inlet or exhaust housing in prohibited.  Turbocharger compressor wheel must be constructed of cast or billet aluminum.  Exotic materials wheels prohibited.”    

Turbocharger: Insert the following paragraph “4G63, single-turbo applications limited to a maximum 74mm (2.913 inches) turbo, where the maximum compressor wheel inducer diameter may not exceed 74.5mm (2.933 inches) measured at the point where the leading edge of the compressor wheel meets the housing; the compressor housing inducer diameter may not exceed 75.75 (2.982 inches) measured at the point where the leading edge of the compressor wheel meets the housing.  Compressor wheel inducer contours of wheel may not be “stepped, notched, or clipped”; e.g. the contours must be continuous features from the inducer to the wheel exducer.  All air entering the turbocharger must pass through the turbocharger inlet.  Injection of any liquid, gas, or any other substance into the inlet or exhaust housing in prohibited.  Turbocharger compressor wheel must be constructed of cast or billet aluminum.  Exotic materials wheels prohibited.”    

Page 55 (eff 05/23/07)
Turbocharger, Ecotec, single-turbo:  Replace “application limited to maximum 68mm turbo, where the maximum compressor housing inducer diameter is 69.5mm (2.736 inches) measured at the point where the leading edge of the compressor wheel meets the housing” with “application limited to maximum 74mm turbo, where the maximum compressor housing inducer diameter is 75.75mm (2.982 inches) measured at the point where the leading edge of the compressor wheel meets the housing”

Page 58 (eff 09/14/07)

Chassis: Remove “original floorpan forward of rear seat, minus 6 square feet for transmission removal, and original firewall” from third sentence in the first paragraph.

Page 58 (eff 09/14/07)

Chassis: Remove “Stock floorpan mandatory from rear of driver’s seat forward, minus 6 square feet for transmission removal” from fourth sentence in the second paragraph.

Page 58 (eff 09/14/07)

Chassis: Remove “Stock firewall mandatory in RWD and RWD conversion cars” from sixth sentence in the second paragraph.

Page 59 (eff 09/14/07)

Body: Remove “bedsides” and “floorpan from rear of driver’s seat forward minus 6 square feet for transmission removal” from first sentence in the third paragraph.

Pro FWD

Page 61 (eff 09/28/07)
Engine Containment Device: Remove “Both engine diapers and catch pans mandatory for 2008.”

Page 62 (eff 07/09/07)

Turbocharger: Replace second paragraph with the following “Four-cylinder, single-turbo applications limited to a maximum 88mm (3.465 inches) turbo, where the maximum compressor wheel inducer diameter may not exceed 88.5mm (3.484 inches) measured at the point where the leading edge of the compressor wheel meets the housing; the compressor housing inducer diameter may not exceed 89.75 (3.533 inches) measured at the point where the leading edge of the compressor wheel meets the housing.  Compressor wheel inducer contours of wheel may not be “stepped, notched, or clipped”; e.g. the contours must be continuous features from the inducer to the wheel exducer.  All air entering the turbocharger must pass through the turbocharger inlet.  Injection of any liquid, gas, or any other substance into the inlet or exhaust housing in prohibited.  Turbocharger compressor wheel must be constructed of cast or billet aluminum.  Exotic materials wheels prohibited.”    

Page 62 (eff 12/21/06)|
Fuel: Replace first sentence with the following “Methanol, NHRA-accepted ethanol, NHRA accepted racing gasoline, gasoline (including E85) diesel, natural gas and propane permitted” 

Page 64 (eff 09/28/07)
Wheelie Bars: Replace “Wheelie-bar wheels must spin free at the starting line” with “Wheelie-bar wheels must spin free from the point where your crew has completed their vehicle check (post burn-out) and the pre stage beam.  Any violation of this rule may result in your run being disqualified.”