ProMaxx Performance Products
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ProMaxx Performance Cylinder without Valvetrain for 91-04 Jeep Wrangler YJ, TJ, TJ Unlimited, Cherokee XJ, Grand Cherokee ZJ & WJ with 4.0 L |CHR640NB
ProMaxx Performance Products
$759.00Restore horsepower, compression and fuel economy to that tired engine with one of our factory replacement heads. Matches original performance flow. Cast # 0331, 0630 & 7120. Engine Size: 4.0L...$759.00Qty in Cart: 0Quantity:Price:$759.00Subtotal: -
ProMaxx Performance Cylinder without Valvetrain for 86-00 Jeep CJ-7, Wrangler YJ, TJ & Cherokee XJ with 2.5L |CHR467NB
ProMaxx Performance Products
$336.99Restore horsepower, compression and fuel economy to that tired engine with one of our factory replacement heads. Matches original performance flow. Cast #117 & 403. Valves, valve springs and...$336.99Qty in Cart: 0Quantity:Price:$336.99Subtotal: -
Cylinder Head with Valves for 86-00 Jeep CJ, Wrangler YJ & TJ and Cherokee XJ with 2.5L Engine |CHR467N
ProMaxx Performance Products
$472.00Save time and money with Promaxx Cylinder Head with Valves, engineered as direct replacement for the CJ, Wrangler and Cherokee models. For the 4-Cylinder, 2.5L engine, this cast-iron head is shipped...$472.00Qty in Cart: 0Quantity:Price:$472.00Subtotal: -
ProMaxx Performance Cylinder Head with Valvetrain for 91-06 Jeep Wrangler YJ, TJ, TJ Unlimited, Cherokee XJ, Grand Cherokee ZJ & WJ with 4.0L |CHR640N
ProMaxx Performance Products
$937.00Restore horsepower, compression and fuel economy to that tired engine with one of our factory replacement heads. Matches original performance flow and is available as a complete ready-to-install unit...$937.00Qty in Cart: 0Quantity:Price:$937.00Subtotal: -
Stroker Engine Crankshaft for Jeep Vehicles with 4.2L Stroker Engine |CHR640CRSHT
ProMaxx Performance Products
$544.00Promaxx Performance extends its reach into the Jeep market with a Stroker Crankshaft for the inline 6-cylinder 4.2L engines. Internally balanced and machined to factory specifications, this crank is...$544.00Qty in Cart: 0Quantity:Price:$544.00Subtotal: