King of the 4V

Sponsored by JE Pistons 

NOTICE: Rules are subject to change without notice. Cars must fit the spirit of the class. Final determination, if there is an issue, resides with the Event Director. 

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. We have two classes: Pro and Street. When you register, you’ll need to specifically state whether you are Pro or Street prior to your first qualifying pass. You can’t dual enter this class for Pro and Street with the same car.

Qualifying Information, Ladder Type & Tree

All Run Qualifying, NHRA Pro .400 tree, Heads-Up, 1/4 mile, Courtesy Stage (Encouraged)

WEIGHTS

Pro – 3000lbs with driver

Street – 3300lbs with driver

*Manual transmissions deduct 150lbs

ENGINE

Engine must be a Modular/Coyote 4.6/5.0/5.4/5.8 based V8 Ford engine. Internal modifications are permitted.

COOLING SYSTEM

Any radiator, water pump and cooling fan/fans permitted.

EXHAUST

Any header size/tubing permitted. Open headers, down pipe ok. Bumper/Fender exit ok.

FUEL-DELIVERY SYSTEM

Pro РAny fuel system permitted and fuel location permitted. 

Street – Fuel tank must be OEM and in OEM location. No aftermarket fuel cells allowed.

FUEL

Pro – All fuels permitted.

Street -Unleaded or E85 only (One Ethanol, Ignite, or Similar). No E98.

TURBOCHARGERS

Permitted.

SUPERCHARGERS

Permitted.

NITROUS

Permitted.

OILING SYSTEM

Pro – Wet and dry oiling systems permitted.

Street – OEM Wet sump only.

INTAKE MANIFOLD

Pro – Air intake coolers and/or ice boxes allowed in passenger compartment.

Street – OEM style intake intercoolers or Air to Air intercoolers permitted. Has to be contained within the engine compartment.

REAR END

OEM or Bolt in 8.8 or 9 inch

TRANSMISSION

Pro – Any OEM automatic or OEM manual transmission required. Powerglide and TH400 are allowed.

Street – OEM Factory style overdrive transmissions only (6R80, 4R70, 4R100, 10r80) and factory manual transmissions (TR6060, T56, T45, MT82)

K-MEMBERS

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.

CONTROL ARMS

OEM or tubular stock type control arms required which must be attached in stock location.

SHOCKS/STRUTS/SPRINGS

OEM or aftermarket shocks/struts/springs permitted. May use coil overs.

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-type, ladder bar, and racing 4-link rear suspension systems are permitted (Pro Cars only).

PANHARD BARS

Permitted.

TORQUE ARMS

Pro -Permitted.

Street – If OEM Equipped.

WISHBONE

Pro – Permitted.

Street – If OEM Equipped.

MINITUB

Pro – Permitted.

Street – Prohibited.

WHEELIE BARS

Prohibited.

FRAME

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

28″ and 29″ tires permitted. No “W” Tires allowed.

WHEELS

Spindle mount wheels prohibited.

INTERIOR

Pro – Dash can be aftermarket fiberglass, or carbon fiber as long as factory appearing. Passenger seats NOT required. If Kirkey or other Aluminum seat is added, it must be properly secured to a harness bar or cage.

Aftermarket front seats are permitted. Rear seats may be removed.

Street – Must have factory dash. Full carpet. Passenger seats required. Aftermarket front seats are permitted. Rear seats may be removed or have a rear seat delete. If Kirkey or other Aluminum seat is added, it must be properly secured to a harness bar or cage. If ballast is used, it must be secured to prevent movement in all directions (including roll overs). Must have functional AC/Heat. All of these items will be thoroughly check before each round.

BODY

Pro – 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.

Street – OEM steel shell required. Aftermarket parts are permitted as long as factory appearing and are limited to hoods and rear trunk only. Hood are mandatory. Must have functional headlights and turn signals.

WINDSHIELD & WINDOWS

Pro – 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.

Street – OEM glass only. No Optic Armor windows or other Lexan glass.

FIREWALL

Stock, unaltered firewall required.

ELECTRONICS

Pro – Trans brake, 2 step, and aftermarket ECU permitted.

Street – Trans brake, 2 step and OEM ECU permitted. No standalone or piggyback control systems.