The BTR LS1/LS2 Stage 4 Camshaft V2 (BTR-LS1STAGE4) is the largest hydraulic roller camshaft in BTR's naturally-aspirated LS1/LS2/LS6 lineup. It delivers a very aggressive idle and trades some low-RPM torque for stronger horsepower higher in the RPM range, with over 500 whp achievable when paired with supporting modifications such as a quality set of cylinder heads, high-flowing intake and throttle body, headers, and a free-flowing exhaust.
- Part Number: BTR-LS1STAGE4
- Application: GM LS1/LS2/LS6-Series
- Camshaft Style: Hydraulic Roller
- Intake/Exhaust Lift: 0.636 in / 0.636 in
- Intake Duration @ .050": 233°
- Lobe Separation Angle (LSA): 111°
This camshaft requires BTR's 0.660-inch lift Platinum spring kit with titanium retainers and hardened pushrods. Any cylinder head milling performed with factory pistons requires fly-cutting the valve pockets and checking piston-to-valve clearance. In automatic-equipped cars, a higher-stall RPM torque converter is required to unlock this camshaft's full potential.
FAQ
What valve springs does the LS1/LS2 Stage 4 V2 camshaft require?
It requires BTR's 0.660-inch lift Platinum spring kit with titanium retainers and hardened pushrods.
What are the lift, duration, and LSA specs?
The BTR-LS1STAGE4 has 0.636 in of intake and exhaust lift, 233 degrees of intake duration at .050 inch, and a 111-degree lobe separation angle.
Is head milling an issue with this camshaft?
Yes — any cylinder head milling done with factory pistons requires fly-cutting the valve pockets and checking piston-to-valve clearance.
Does this camshaft require a torque converter change in automatic cars?
Yes, a higher-stall RPM torque converter is required in automatic-equipped cars to unlock the camshaft's full potential.
