AMC 401 Dished Piston Set 4.195 Bore -27cc

The AMC 401 Dished Piston Set 4.195 Bore -27cc by Wiseco-Pro Tru represents a premium forged piston solution engineered for serious AMC 401 engine builders and performance enthusiasts. Whether you're restoring a classic Javelin, Gremlin, or muscle car, or building a high-output street engine, this piston set delivers the compression geometry and durability required for reliable, repeatable power gains. AMC 401 builds demand pistons that balance strength, thermal management, and precise bore fitment—and this -27cc dished design provides exactly that foundation for both stock-class restorations and modified applications.

Wiseco's forged piston construction utilizes advanced metallurgy to withstand the combustion pressures and thermal cycling inherent in AMC engines, particularly when fuel octane and ignition timing are optimized. The -27cc dished crown reduces compression volume, lowering the effective compression ratio—a critical feature if you're running lower-octane fuel, installing a modest turbo or supercharger, or need to dial back boost pressure on a forced-induction build. The 4.195-inch bore specification ensures precise fitment in standard or already-bored block applications. Dished pistons also improve quench clearance and help prevent detonation by promoting more controlled flame propagation in the combustion chamber.

This piston set is ideal for engine builders tackling street 401 applications, weekend drag racing builds, or restorations where durability matters more than chasing absolute peak horsepower. Installation requires proper ring end-gap filing, standard bearing clearances, and correct piston-pin fitment per Wiseco specifications and your engine's particular block condition. The set's 15.44-pound weight reflects a complete package ready for assembly into your short-block. Pair this with quality rings, rod bolts, and ARP fasteners for a bulletproof foundation that will survive years of reliable driving or track duty.