ARP 120-2502 Square Drive Balancer Bolt Kit for BUICK ymm_31 Sigma 1990-1992

Sigma 1990-1992

Temp (including RTD)

the addition of these pipes makes remapping the ECU mandatory to get the full potential from the system

Standard 1/8”- 27 NPT inlet/outlet with included ¼” push-to-lock hose fittings for easy installation

The system is split in 2 codes only because of packaging reasons

ARP 120-2502 Square Drive Balancer Bolt Kit for BUICK ymm_31 Sigma 1990-1992Square Drive Balancer Bolt Kit (120 2502) by ARP. As the crankshaft flexes and twists, the harmonic damper absorbs incredible amounts of kinetic energy. To ensure that the damper is locked in position, ARP has developed these ultra strong 200,000 psi bolts that let you exert maximum clamping force. Special features include 1 4" thick, wide area washer and an extra tall 12 point head that accepts a deep socket and eliminates the worry of stripping the