Hypertech 121351 Hypertech Street Runner Power Chips ARP Pro Series Cylinder Head Bolt Kits ARP timing cover bolt kits

ARP timing cover bolt kits provide reusable fasteners that maintain clamp load through thermal cycles

Switching to these premium valves reduces valvetrain weight

The manifold accepts both square-bore and spread-bore carburetors and includes a comprehensive gasket set and stainless steel bolts

line-locks

water leaks

Hypertech 121351 Hypertech Street Runner Power Chips ARP Pro Series Cylinder Head Bolt Kits ARP timing cover bolt kitsThe Hypertech 121351 Hypertech Street Runner Power Chips from Hypertech is a direct ECU reprogramming solution that replaces your vehicle's factory calibration EPROM with an optimized performance tune. Designed for OBD I and early OBD II gasoline vehicles, this performance chip rewrites fuel and spark tables for measurable horsepower and torque gains. It's a straightforward hardware upgrade that requires no laptop, no software, and no dyno tuning.