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PROMAXX Performance Stock Replacement Cylinder Heads

PROMAXX Performance stock replacement cylinder heads are designed to be a direct replacement for your worn or cracked heads. These are new castings, modeled off OE castings for factory fit and finish. Some applications feature a thicker deck to solve common warping or cracking issues. Instead of spending the time and money refurbishing your existing heads, use PROMAXX Performance stock replacement cylinder heads.

4.57 out of 5 stars ( 7 )

$478.00

PROMAXX Performance Xtreme Valve Spring and Retainer Kits

If you want to add some horsepower to your engine, then you'll also need a PROMAXX Performance Xtreme valve spring and retainer kit. The valve springs have been designed for cylinder heads using larger valves and aggressive camshaft profiles. PROMAXX Performance Xtreme kits also include retainers, locks, machined valve spring seats, and new valve seals.

Not Yet Reviewed

$401.00

PROMAXX Performance Series One Small Block Ford Cylinder Heads

PROMAXX Performance Series One small block Ford cylinder heads are affordable, high-flow as-cast versions of fully CNC-ported heads. These heads feature ultra-smooth 356 T-6 aluminum casting, 5-angle valve jobs, precision CNC machining, and diamond-honed bronze guides. Put track-tested performance under your hood with a formidable pair of professionally assembled Series One small block Ford cylinder heads. They are available assembled or bare. Features, items, and specs: * 175cc as-cast intake runners * Multiple spring options * Assembled heads include 21-4N one-piece swirl-polished back-cut stainless steel valves, 3/8 in. studs, and adjustable guide plates

4.0 out of 5 stars ( 1 )

$511.00

PROMAXX Performance Gold Series Valve Spring and Retainer Kits

Looking for performance? PROMAXX Performance Gold Series valve spring and retainer kits are one of the most widely used and trusted "drop-in" dual spring options. They work with both stock and aftermarket rocker arms—and no cutting or machining is needed on the stock spring pocket. These kits consist of Gold dual springs, titanium retainers, machined locks, machined spring bases, and 16 Viton® rubber seals. Go for the gold: Gold Series valve spring and retainer kits from PROMAXX Performance!

Not Yet Reviewed

$376.00