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Three tuning modes — Economy for better mileage
providing real-world timing numbers that experienced engine builders trust for calculating dynamic compression and valve overlap
Expect a 50-60% reduction in backpressure versus the stock exhaust system
Dial in your F-150 for prerunner pace or rock-crawling precision
ARP 204-4204 ARP Pro Series Cylinder Head Studs American Force Three tuning modes — EconomyThe ARP 204 4204 ARP Pro Series Cylinder Head Studs provides superior cylinder head clamping compared to factory TTY (torque to yield) fasteners. These head studs are manufactured from 8740 chromoly steel, heat treated to 190,000 200,000 psi tensile strength, with precision rolled threads for consistent clamp load across every installation. Part 50818 is configured for its specific application with attention to fitment requirements. ARP Pro Series
US$ 12.00
US$ 23.00
US$ 28.99
US$ 10.50
