• ThunderMax Cams by Red Shift typically ship 1 business day from the date the order is placed. If this changes once an order is placed, you will be notified immediately.

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ThunderMax Cams by Red Shift have been the choice of high performance engine builders for over 3 decades. Designed by master engine developer Dick Hilferty and manufactured by Zipper's Performance Products using the most advanced engineering process available, you can rest assured that Red Shift Cams will create the power you desire.

575-HS

Bolt in cams for '07 & newer 96", 103" and 110" engines with stock, unmodified heads. Great bolt-in upgrade for '96 or 110" engines and also works well in 96" / 103" conversions. Lowers engine temperatures, increases torque and horsepower throughout with an emphasis on torque.

577-HS

This is the cam to use for '07 & newer 103" and up conversion engines with flat-top pistons and stock or ported heads (bolt-in with stock conical springs). Provides smooth power without detonation. Broader timing for lower cranking compression and lower temperatures; great mid-range torque with strong top-end pull.

657-HS

Maximum torque grind for '07 & newer larger displacement engines (107"+) with heavy payloads. Narrower timing increases compression for more low-end grunt. Excellent valve train dynamics for long life. Works well with most touring model exhausts.

647-HS

Maximum power grind for '07 & newer larger displacement engines (113"+). Broader timing for higher compression applications with great valve train dynamics for long life. Compliments high flow heads, intake and exhaust.

557-TC

88"-95" Twin Cam grind producing smooth, quiet operation with excellent valve control for '99-'06 engines. Strong torque curve works well for riders who like cruising at lower RPMs and 95" dressers pulling heavy payloads. Bolt-in with conical springs ('05-'06); small amount of clearance required on some earlier year cases. Recommended compression range 9.0-9.8:1.

575-TC

Torque camps specifically designed for '99-'06 CVO 103" engines. Best choice for riders wanting a large increase in useable torque with durability and smooth, quiet operation. Creates best power between 2000-48000 RPM for a strong pull you will enjoy with every shift. Bolt-in with CVO 103" heads or '05 & newer heads with conical springs.

577-TC

Performance cams for'99-'06 95"-103" engines. Nice, smooth power and big torque in engines with good flowing heads, increased compression (9.5-10.5:1), performance ignition, exhaust or larger carburetor or throttle body. Bolt-in with conical springs or CVO 103" heads. Can produce 105-110 rear wheel horsepower and torque in 95" engines.

657-TC

Popular big lift cam in '99-'06 engines designed for powerful torque applications having produced over 120 rear wheel horsepower in a 107" engine with mild compression, mufflers and pump gas. Great performance with excellent valve train dynamics.

647-TC

Designed for true performance enthusiasts who require a wide, usable power curve and strong top end charge with excellent valve control. Recommended in 116"+ '99-'06 engines; 10.0-10.5:1 compression for pump gas.

727-TC

Intended for drag racing but can be used for big displacement, performance application engines. Requires highly modified heads with special valve springs. Available in gear drive only.

Require adjustable pushrods and are available in chain or gear drive.

Made in the USA.