Updated: JUNE 28, 2020
DXP Street is a heads-up small block V8, small tire class
vehicles. Small block engines are allowed the use of a
single power adder which is restricted to a single spec
4150 style nitrous plate to maintain class parity. Cross
breeding of an engine to a different make/manufacturer
body is permitted.
Note: This set of class rules is presented to all
competitors under the assumption that any modifications
not specifically written within these rules shall be
deemed illegal, unless the competitor has the expressed
written consent from the Event Tech Director. DXP
Technical Dept reserves the right to inspect vehicle and
data at any time during the event.
This class will be a 32-car heads-up field, 1/8 mile,
NHRA Pro Style Ladder on a .400 Pro Tree.
All minimum weights include the driver
Small Block V8 Engines only
440 cubic inch max (440-472 ci engines add 50lbs)
No Buick, Olds, Pontiac
Standard 23/20 degree or 15 degree cathedral port LS head
Raised intake runner 23/20 degree or 15 degree square port
LS head 3000 lbs
Inline valve non-stock valve angle head or LS 12 degree
head 3050 lbs
Non-inline/Canted valve head 3150 lbs
Any aftermarket cast iron or cast aluminum block
permitted. LSX block bolt pattern is permitted for LS
based engines. World Products Man-O-War bolt pattern is
permitted for small block Ford engines. Billet Blocks
prohibited. All blocks are restricted to factory OEM bore
spacing and deck height for brand being used Max deck
height for the following:
SB Ford 9.500 max
SB Chevy 9.325
LS Chevy 9.240
SB Mopar 9.600
8.2 Ford deduct 100 lbs
All cars are limited to a dedicated single 4150
opening cast intake and a single 4150 carburetor. (4
blade, round 1.750 blade). Carburetor must have
commercially available cast main body and base plate.
Billet metering blocks are permitted. Fuel injection of
any kind is prohibited.
Injection or introducing Fuel and Nitrous is limited to
the Carburetor and Nitrous Plate only.
must be mounted in the conventional matter (Float bowl
front to back). No turning the
Any aftermarket, commercially available, mass
produced, single inlet, 4150 carb series, cast intake
manifold required. Fabricated, sheet metal, billet, and
any tunnel ram intake manifolds are prohibited.
All entries are limited to use one single stage spec
plate system (NOS Cheater p/n 12500). Nitrous plate must
maintain as shipped, no modification of any part of plate,
tubes or fittings will be permitted. Nitrous can ONLY be
introduced into the engine from one of the two spray bars
in the 12500 NOS Cheater Plate.
plate must be installed with Nitrous and Fuel inlets
facing front and back of vehicle. No turning the plates
Nitrous push systems are prohibited. Progressive or timer
activation is permitted. The use of agents other than
nitrous oxide as part of, or mixed in, the system is
prohibited. All entries must use only gasoline for the
fuel enrichment circuit. All entries are permitted to use
a maximum of one 10lb nitrous bottle. Any method of
cooling the nitrous bottle inside the vehicle is strictly
prohibited. Bottle temperatures will be randomly checked
before and/or after a run. If the bottle temperature is
found to be colder than 65 degrees, the run will be
disqualified. All entries are required to have one
continuous #4 (.150 Max ID, hole must be a concentric
circle. No other shape allowed such as ovals, diamonds,
etc.) nitrous supply line from the nitrous bottle to the
engine (shut off valve permitted in the drivers
compartment). Maximum length of nitrous supply line from
nitrous bottle to nitrous supply solenoid is 15ft. The
line from the valve to the engine cannot store/hold
nitrous oxide when the system is not in use.
Purge line must exit completely outside the engine
compartment and be directed away from any and all engine
DXP reserves the right to randomly swap nitrous plates any
time during qualifying or eliminations.
Meth injection is prohibited.
VP Racing Fuels Gasoline, Q16, C-85, E-85, C12, 16, 23,
45, or NO2 are the only fuels permitted.
DXP reserves the right to inspect fuel at any time during
competition Failure to pass Fuel Check is grounds for
disallowance of the run during competition and
disqualification from the event during eliminations. Fuel
is checked using various means. Samples given to Fuel
Check Technical Inspectors are compared to data taken from
known fuel samples provided by VP, adjusted for
temperature, and within a tolerance determined by DXP.
Failure occurs when the sample readings fall outside those
tolerances. Alcohol is prohibited.
Battery-operated ignition system permitted.
Distributor less (COP) and Magneto ignition systems are
Any cooling system permitted. Radiators are not
Any exhaust system permitted. All exhaust systems must
be directed out of body and away from driver and fuel
tank. Exhaust may exit underneath car or out of the front
fenders but must not affect timing or staging beams.
Any OEM style transmission is permitted. Lock-up style
transmission and/or torque converters are prohibited.
Converter drive transmissions, or transmission dumps
and/or any type of fluid
management is prohibited. Maximum of 3 forward speeds.
Trans brake and electric shifters are permitted. A maximum
of 2 wires permitted to the transmission.
Clutch, Clutchless, or Stick shift Transmissions
The car must retain its original appearance, profiles,
and dimensions. Factory roof and quarter panels must be
used. Aftermarket fiberglass and carbon/or carbon fiber
replacement panels are limited to hood, front fenders,
doors, deck-lids, and bumpers only. All front ends must be
of factory dimensions and cannot be stretched. Aftermarket
wings and spoilers are permitted. A hood must be used:
scoop or hood must cover the entire induction system.
Forward facing hood scoop are permitted.
stock appearing front and rear bumpers are required.
Bumpers must be in stock location and be Factory
Dimensions. Chin Spoilers/ Lower Valence panels may be
modified (Chin Spoilers/ Lower Valence may not extend past
the leading edge of the front facia / bumper). Beam
trippers, extenders prohibited. Alterations or aerodynamic
modifications are prohibited.
No company names or sponsors of any kind on body of the
ENGINE MOUNTS & LOCATION
Engine/motor plates and mid-plates are permitted.
Engine block and cylinder heads cannot be in contact with
Stock frame required from the forward edge (closest to
the bumper) of shock/strut tower to the Firewall. Front
and rear sub frames may be joined together. Forward of
shock/strut tower can be.
Any questionable modifications must be approved by Event
Tech Director prior to event.
Entries must retain stock wheelbase dimensions of + or
– 2 inches. Maximum wheelbase variation from left to right
is 1 inch.
A minimum of 3 inches from the front of the vehicle to
12 inches behind front spindle centerline is mandatory. A
minimum of 2 inches for the rest of the vehicle is
mandatory (except for oil pan and exhaust headers).
Factory type front suspension only. Coil over shocks
are allowed. Aftermarket replacement control arms are
allowed. Aftermarket K-Members/Commercially available
sub-Frames allowed. (Must have prior approval from tech)
Strut towers must be in factory location with factory
sheet metal attaching factory frame rail to top of strut
tower, can be notched, windowed or trimmed for header
clearance, but must retain factory sheet metal attachment.
Stock-type, ladder bar, and racing 4-link rear
suspension systems are permitted.
All cars must compete on a Mickey Thompson Drag Radial
tire with the following sidewall designation P275 60R/15.
Part Number 3453
The use of wheelie bars is prohibited.