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Free US shipping ✦ Certified Dynojet, ThunderMax & Impact tuner ✦ Tuned on our dyno in Red Bay, AL
Star Thrasher 650 Twin Cam Camshaft - .650 Lift
$449.95
Star Thrasher 650 Twin Cam Camshaft — .650 Lift
The most aggressive cam in the Star Twin Cam lineup — built for high-performance street riding and track days.
Part Description
The Star Thrasher 650 is the top of the Star Twin Cam camshaft range — a high-performance, high-lift cam engineered for riders who demand more from their 2007-and-up chain-drive Twin Cam engine on the street and on the track.
With .650" intake lift closing early at 40 ABDC and a TDC lift of .189 x .189, the Thrasher pushes well beyond the territory of bolt-on performance and into serious build territory. The exhaust lobe opens early at 60 BBDC to boost top end performance. This unusual design delivers big power early and maintains it through the widest powerband ever.
Aftermarket pistons and springs are required, and piston-to-valve clearance must be verified by an experienced builder before startup. Done right, the Thrasher delivers the kind of aggressive, high-output performance that serious Twin Cam builds are built around. Recommended install with Star .655 Lift Spring Kit (TC20-20350).
Quantity
Key Features
- Most powerful cam in the Star Twin Cam lineup — engineered for maximum performance
- .650 lift — highest lift available in the Star Twin Cam range
- .189 TDC lift — aggressive lobe profile for peak airflow and power output
- Compatible with any Twin Cam displacement — scales across all build sizes
- Designed for high-performance touring and occasional track use — built for riders who want both
- Chain-drive design — fits 2007-and-up Twin Cam engines
Quick Specs
- Lift: .650"
- IVC: 40°, 240 x 260 duration
- TDC Lift: .189 x .189
- RPM Range: 2,500 - 6,500 RPM
Performance and Ride Feel
- Excellent low-end power and throttle response carrying through a massive powerband
- Strong pull from ~2400 RPM all the way to redline
- Best For: High-performance touring & occasional track visits
Fitment and Install Notes
Twin Cam 103 - 117 engines
Years: 2007+
Valve Springs: TC20-20350 recommended
Lifter Guides: Stock
Push Rods and Lifters can be stock.
Exhaust pairing matters: Star Cams will perform with all pipe configurations, but exhaust selection has a meaningful impact on results. Short exhaust systems create sound wave differentials that negatively affect low-RPM tune quality — a condition that cannot be fully corrected through tuning alone. For the smoothest low-end torque curve, a long 2-into-1 exhaust is strongly recommended. Trusted options include D&D, Fuel Moto, Bassani, ThunderHeader, and Krome Werks.
Piston-to-valve clearance must be verified by an experienced builder prior to startup — this is a critical pre-installation step, not optional. Experienced installer strongly recommended — this is not a standard bolt-on installation. Professional tuning required for best results.
Star Thrasher 650 Twin Cam Camshaft — .650 Lift
The most aggressive cam in the Star Twin Cam lineup — built for high-performance street riding and track days.
Part Description
The Star Thrasher 650 is the top of the Star Twin Cam camshaft range — a high-performance, high-lift cam engineered for riders who demand more from their 2007-and-up chain-drive Twin Cam engine on the street and on the track.
With .650" intake lift closing early at 40 ABDC and a TDC lift of .189 x .189, the Thrasher pushes well beyond the territory of bolt-on performance and into serious build territory. The exhaust lobe opens early at 60 BBDC to boost top end performance. This unusual design delivers big power early and maintains it through the widest powerband ever.
Aftermarket pistons and springs are required, and piston-to-valve clearance must be verified by an experienced builder before startup. Done right, the Thrasher delivers the kind of aggressive, high-output performance that serious Twin Cam builds are built around. Recommended install with Star .655 Lift Spring Kit (TC20-20350).
Star Thrasher 650 Twin Cam Camshaft - .650 Lift
$449.95
$449.95
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$449.95
$449.95
Star Thrasher 650 Twin Cam Camshaft - .650 Lift
