ARP Harmonic Balancer Bolt (Crank Bolt) for LS & LT Engines - 234-2503ARP Harmonic Balancer Bolt (Crankshaft Bolt) for GEN 3 4 LS & GEN 5 LT Engines (4. 8L 5. 3L 5. 7L 6. 0L 6. 2L) ARP 234 2503 (Replaces GM Part Number 12557840) The OEM crankshaft bolt on the GM LS and LT engine platforms is torque to yield and is designed to be replaced anytime it is removed, however, ARP's crank bolt is torque to spec and reusable. Additionally, the ARP crank bolt is significantly stronger than the OEM crank bolt and is rated to

you'll be able to determine which you need during installation

Belltech's specifically designed McPherson strut with relocated spring seat mounts allow for different spring seat positions

Gen III & IV (All GM LS Series)

660" lift) valve spring kit with steel retainers (includes valve seals)

Braided Hose

BTR PDS STAGE 4 CAMSHAFT V2

To accomplish this

BTR STAGE 4 TRUCK CAM V2

LS & LT based engines utilizing standard production timing geometry

NOTE: The -12AN kit uses an oil fill cap adapter which will require a hole in the coil cover on wet sump models

-These will fit all Trick Flow cathedral port heads

Also fits FAST™ EZ-EFI 4150 Throttle Body and some Inglese™ 8 Stack EFI Systems