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GM Turbo-Hydramatic 400 ("TH400" or "THM400")
Fan 1 Diameter: 16
performance street vehicles
Maximum Air Flow: 1600 cfm
carbureted fuel system requiring 5–12 PSI regulation — the highest range in TSP's non-return regulator lineup (1–4
Pro Series Ford Big Block 390-428 FE Cylinder Head Bolt Kit Camshaft GM Turbo-Hydramatic 400 ("TH400" orRestore proper sealing and performance in your Ford FE engine with the Pro Series Cylinder Head Bolt Kit, designed for 390, 427, and 428 big block applications. Factory head bolts can weaken over time or lose clamping force after repeated heat cycles, especially in rebuilt or performance engines. This kit delivers consistent clamping strength to help maintain proper head gasket sealing and engine reliability under load. Manufactured from heat treated
