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www.dps-performance have the cheapest as well as strongest. ARP will make them but they are 2x as expensive, 1/2 the strength, and will take 4x the time to get them to your door due to production.
Max w/ head bolts is 17 psi. max w/ head studs is determined by your other mods... If you have no other mods, you wont be able to get above 20ish psi anyways. They are really just a piece of mind for those who run high psi at all times, like me. I hit 15 psi going 75mph every day.
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Slideshow: Called the Fortress, the 850-horsepower pickup combines Raptor underpinnings with military-inspired features, survival equipment, and a starting price of $285,000.