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HA1-HDG4 kit features ACT's most popular Heavy Duty pressure plate
AI4-XTG6 kit features an Xtreme pressure plate for the most demanding driver
*requires high-flow cat or downpipe to be a bolt on system
TC4-XTG4 kit features an Xtreme pressure plate for the most demanding driver
Burst Pressure: 10
BBK 14-18 GM Truck 5.3/6.2 1 3/4in Shorty Tuned Length Headers - Polished Silver Ceramic (40470) 25215 HA1-HDG4 kit features ACT's mostThese BBK Performance shorty tuned Length exhaust Headers are designed and constructed as direct fit replacements for all 14 18 Chevrolet GM 5. 3 6. 2 Full Size Truck applications. Each header is manufactured with 1 3 4" CNC mandrel bent tubing that offers unrestricted exhaust flow for increased horsepower and torque over factory OEM manifolds. BBK tuned Length headers offer improved scavenging waves for better combustion which leads to improved
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