Product details:

Trick Flow Specialties TFS-90306: Valve Spring Compressor, Cathedral Port LS Cylinder Heads, Cylinder Head On, Steel, Chevy, Each - Make valve-train servicing on your engine easier with Trick Flow valve spring compressors. These specially made tools can remove the valve springs with cylinder heads mounted to the engine block, even on engines already installed in the vehicle. And, they make track changes quicker! Trick Flow valve spring compressors are a must for servicing valve springs, retainers, camshafts, and valve seals. TFS-90306 fits these applications: CHEVROLET 6.0L/364 Chevy small block Gen III/IV (LS-based engines), CHEVROLET 5.7L/350 Chevy small block Gen III/IV (LS-based engines), CHEVROLET 5.3L/325 Chevy small block Gen III/IV (LS-based engines), CHEVROLET 4.8L/294 Chevy small block Gen III/IV (LS-based engines).