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Free US shipping ✦ Certified Dynojet, ThunderMax & Impact tuner ✦ Tuned on our dyno in Red Bay, AL
Star .655 Lift Twin Cam Valve Spring Kit - 7mm
$349.95
Star .655 Lift Twin Cam Valve Spring Kit with Titanium Retainers
The valve train upgrade your high-lift Twin Cam build demands.
Part Description
Built for Twin Cam engines running high lifts like those with Star Racing's P38 Lightning 615 and Thrasher 650 camshafts. This spring kit is engineered to handle the demands of aggressive lift profiles without compromise. Lightweight titanium retainers reduce reciprocating mass for cleaner valve control at high RPM, while the race-spec springs deliver consistent seat pressure and reliable return across the full lift range — whether you're building for the street or the strip.
Supports up to .655 lift.
Designed to pair directly with the Star P38 Lightning 615 (TC615C) and Star Thrasher 650 (TC650C) camshafts.
Fitment: Twin Cam 2007+ (non-CVO)
Quantity
Key Features
- Kibblewhite race-spec springs — proven performance, not budget aftermarket
- Titanium retainers — reduced reciprocating mass for improved high-RPM valve control
- Supports up to .655 lift — matched to Star Racing 615 and 650 cam profiles
- 7mm stem fitment — direct replacement, no machining required. Built for street and strip applications
Install Notes
Confirm cylinder head valve stem diameter is 7mm before ordering. Recommend professional installation with proper spring compressor tooling. Verify coil bind clearance at full lift before final assembly.
Star .655 Lift Twin Cam Valve Spring Kit with Titanium Retainers
The valve train upgrade your high-lift Twin Cam build demands.
Part Description
Built for Twin Cam engines running high lifts like those with Star Racing's P38 Lightning 615 and Thrasher 650 camshafts. This spring kit is engineered to handle the demands of aggressive lift profiles without compromise. Lightweight titanium retainers reduce reciprocating mass for cleaner valve control at high RPM, while the race-spec springs deliver consistent seat pressure and reliable return across the full lift range — whether you're building for the street or the strip.
Supports up to .655 lift.
Designed to pair directly with the Star P38 Lightning 615 (TC615C) and Star Thrasher 650 (TC650C) camshafts.
Fitment: Twin Cam 2007+ (non-CVO)
Star .655 Lift Twin Cam Valve Spring Kit - 7mm
$349.95
$349.95
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$349.95
$349.95
Star .655 Lift Twin Cam Valve Spring Kit - 7mm
