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Ships within 48 hours · Estimated delivery Sep 26 - Oct 1
300+ CFM on +1mm valve
2025 USAC Championship Winner - Tyler Nelson
K20 or K24 available
As OEM castings have gone out of production
1 - Ring Squaring Tool
4P Kingpin Turbo K-Series Race Head GTR 300+ CFM on +1mm valveIntroducing the 4P "Kingpin" K Series Race Head This cylinder head is specifically designed to take the extreme abuse of ultra high horsepower applications. As SFWD, AWD, and Pro RWD cars begin to exceed 1500whp, 1800hp, and even 2000+hp, the OEM head castings become a failure point, often splitting in half or cracking through the deck and port walls. The 4P Kingpin uses the 4P Race Casting which features a deck that is 3x thicker than any OEM
