NOTICE: Rules are subject to Change without Notice.
King of the 4v is a racing class for all vehicles equipped with a late-model modular based V8 overhead cam 4v powered vehicles with a license plate and insurance.
Qualifying Information, Ladder Type, & Tree.
All Run Qualifying, NHRA Pro .400 tree, Heads-Up, 1/4 mile, Courtesy Stage (Encouraged)
Minimum weight of 3200lbs.
Fox Body and other vehicle swaps permitted.
Engine must be a Modular 4.6/5.0/5.4/5.8 based V-8 Ford engine. Internal modifications are permitted. 5.0 Coyote Engine permitted.
Any radiator, water pump and cooling fan/fans permitted; Cooling system must be contained inside the engine compartment
Any header size/tubing permitted. Open headers, downpipe ok. Bumper/Fender exit ok.
OEM or aftermarket tank in trunk or stock location. Fuel cell in engine bay prohibited.
All fuels permitted.
Any size turbocharger permitted. Twin turbos ok. Nitrous permitted with turbocharger. Forward facing turbo(s) permitted.
Any size supercharger. Nitrous permitted with supercharger.
Any nitrous setup ok.
Wet sump system only.
Air intake coolers and/or ice boxes allowed in passenger compartment.
OEM or Bolt in 8.8 or 9 inch
Any automatic or manual transmission permitted
Aftermarket K-Members permitted, but must attach to the chassis using only the original factory OEM type mounting bolts in the factory mounting location. Motor plates ok. No part of the K-member may be permanently attached to the chassis. K-member may be modified in oil pan area to allow oil pan enlargement or removal.
OEM or tubular stock type control arms required which must be attached in stock location
OEM or aftermarket shocks/struts/springs permitted. May use coil overs.
STOCK TYPE SUSPENSION
Stock type suspension may utilize aftermarket, direct replacement type suspension components including aftermarket replacement shocks, springs, coil overs and/or control arms. All stock type 3-link and 4- link suspensions must maintain stock lateral angles and attachment points, but may be moved up or down on rear axle. Aftermarket torque arms permitted.
Stock, unaltered frame rails required. Sub-frames may be joined under car. If connector protrudes through floor, floor must be completely welded to connector. Stock front /rear sub-frames must remain stock, unaltered, and in stock location
TIRES & WHEELS
Any tires permitted.
Spindle mount wheels prohibited
Must have carpet, headliner, and factory appearing dash. Dash can be aftermarket fiberglass, or carbon fiber as long as factory appearing. Passenger seats NOT required. Aftermarket front seats are permitted. Rear seats may be removed.
OEM steel (fiberglass/composite if OEM equipped) body shell required. Aftermarket body parts are permitted as long as factory appearing and are limited to hoods, front bumper covers, fenders, doors, and rear deck lids. Hood is required. Any rear wing permitted.
WINDSHIELD & WINDOWS
OEM glass or NHRA approved Lexan is required and must maintain a Ford OEM appearance. Optic Armor windows are ok. Braces allowed. If carbon fiber/fiberglass doors are used Lexan windows with supports allowed.
Stock, unaltered firewall required
Trans brake, 2 step, and aftermarket ECU permitted