This class is open to everyone and every combination. LSX Rumble’s index-style rules make it the most popular class at the GM Performance Parts LSX Shootout. All Rumble class competitors may compete for no additional charge in Saturday’s Tremec LSX True Street class.

This is an index style drag racing class designed to attract most all vehicles not fitting in the LSX Heads up classes.
Any vehicle powered by a GM LS style power plant permitted.
All races are on a .500 Pro Tree and in an index format.
This will be an ALL RUN qualifying format.
Vehicles are required to be stock appearing and stock bodied.
All vehicles MUST pass NHRA safety inspection for ET and speed.
A Sportsman ladder will determine running order based off Saturday evenings qualifying round, closest to index without exceeding.
Vehicles must be driven to staging and to scales, can be towed after scales.
Vehicles are required to run NMCA windshield banner and Sponsor decal on front windshield.

Index classes are out lined as follows:
AA/LSX 8.50
A/LSX 9.00
B/LSX 9.50
C/LSX 10.00
D/LSX 10.50
E/LSX 11.00
F/LSX 11.50
G/LSX 12.00
H/LSX 12.50
I/LSX 13.00
J/LSX 13.50
K/LSX 14.00

Delay boxes, cross-over boxes, or any “reaction-time related” electronic bracket racing aids prohibited in this class. Throttle stops and all related throttle-stop type accessories prohibited. Trans brakes permitted.

NMCA WINDSHIELD DECAL – must be installed on top of windshield. This NMCA decal must be the only decal on top of windshield. Other vehicle sponsor decals may be placed at base of windshield.
NMCA SIDE DECAL- must be installed on side widow of vehicle.
CLASS SPONSOR DEACAL- GM Performance Parts decal must be installed on lower right side of front windshield.

Decals are required to appear only on the rear quarter windows or rear window in a clear and orderly fashion. Contingency decals may not be overlapped or modified

Following the completion of Friday and Saturday’s Time Runs and True Street Eliminations, each LSX Rumble (Index) driver will be required to select an Index and officially submit it to the LSX Event Coordinator prior to Saturday evenings qualifying session. There will be a single qualifier Saturday evening to establish a qualifying order. In eliminations on Sunday morning a 32 or less car field will be laddered on a sportsman ladder. A 33 or greater car field is randomly paired until the field reaches 32 cars or less. When the field reaches 32 cars or less a sportsman ladder for the number of cars remaining will be used to pair the cars. Car placement on the ladder will be determined based on closest to index (without breaking out) for the last round that was randomly paired.

Each LSX Rumble competitor will have the option to run and compete in the NMCA’S Tremec Transmissions True Street category on Saturday at no additional charge. For rules and regulations pertaining to True Street please refer to the 2010 NMCA official Rule Book or log on to