501 Series Performance Heads 44 by 37.5 Valves, Pair

This is a brand new Set of 501 High Performance Cylinder Heads for a VW Type 1 2 or 3 Dual Port. Heads comes with Stainless Steel 44mm Intake and a Stainless Steel 37.5mm Exhaust Valves, with Harden Keepers, Chromoly retainers, and Single high rev springs. They areready to install.

The 501 Series Castings come STD with: Increasedmaterialat the intakesurfacegivingyou theabilityto make much bigger ports. Amodernized Combustionchamber, for increased head flow & performance. AsecondFull Fin, soyoucanFlycutyourheads deeper to achieve almost any desired Head CC volume needed. Blocked off rocker stud bosses, to eliminate the O-ring and stoppossibleoil leaks. Long reach 3/4 Inch SparkPlugs, toreduce the chance of cracking betweenthe Valve seat and Plug.

Engine: VW Type 1 2 and 3 1600 Dual Port

Springs: Single or Dual High rev

Valves: 44mm Intake by 37.5mm Exhaust

Casting: AA Performance 501

Plug Size: 12mm (ReplacementNGK Number is D8EA)

Head CC's:55

Bore: 85.5, works with 85.5,87, and 88 slip in kits

Bore: 92, works with 88 thick wall, 90.5 and 92mm kits

Bore: 94, works with 92 thick walls K and M, and 94mm kits

Please Pick Bore size, and Spring Upgrade when ordering Above