4500 TUNER / ENGINE BUILDER OPEN SPACER KIT SET OF 3 390 JLine Performance Racing Block

JLine Performance Racing Block

We port match the runners to a Fel-Pro 1206 intake gasket (very commonly used)

New for 2019 is the HI-BOOST (HB series) of performance throttle bodies

bottle brackets or intake

Computer designed from 6061 T6 aluminum

4500 TUNER / ENGINE BUILDER OPEN SPACER KIT SET OF 3 390 JLine Performance Racing BlockKit includes all four 4500 spacers. Part numbers. 020001 020010 020050 Wilson Manifolds open spacers have become the standard in NASCAR NEXTEL Cup racing, but are for use in any application where a top quality light weight billet spacer is desired. Open spacers increase plenum volume and move the throttle blades away from the roof of the runners, allowing the air fuel mixture to turn more easily into the runners for improved distribution and mixture