Engine Internals

From pistons and connecting rods to camshafts, crankshafts, bearings, and gaskets, our engine internals selection has everything needed for a reliable bottom end and a high-revving top end. With forged and performance options alongside OE-style replacements, every component is built for precision and durability. Lay the foundation for serious power and keep your engine strong under pressure.
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GSC P-D Mitsubishi 4B11T 21-4N Chrome Polished Intake Valve - 35mm Head (STD) - Single

Regular price $36.99
Sale price $36.99 Regular price
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GSC P-D Mitsubishi 4B11T 21-4N Chrome Polished Intake Valve - 35mm Head (STD) - SingleThis...

GSC P-D Subaru EJ20/EJ257 Turbo Chrome Polished Super Alloy Exhaust Valve - 33mm Head (+1mm) -Single

Regular price $50.99
Sale price $50.99 Regular price
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GSC P-D Subaru EJ20/EJ257 Turbo Chrome Polished Super Alloy Exhaust Valve - 33mm Head (+1mm)...

GSC P-D EJ series EJ205/EJ207/EJ257 Chrome Polished Super Alloy Exhaust Valve-32mm Head(STD)

Regular price $50.99
Sale price $50.99 Regular price
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GSC P-D EJ series EJ205/EJ207/EJ257 Chrome Polished Super Alloy Exhaust Valve-32mm Head(STD)This Part Fits: Year...

GSC P-D Subaru EJ205/EJ207/EJ257 Chrome Polished Intake Valve - 37mm Head (+1mm) - Single

Regular price $35.99
Sale price $35.99 Regular price
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GSC P-D Subaru EJ205/EJ207/EJ257 Chrome Polished Intake Valve - 37mm Head (+1mm) - SingleThis Part...

GSC P-D Subaru Subaru EJ205/EJ207/EJ257 Chrome Polished Exhaust Valve - 33mm Head (+1mm) - Single

Regular price $35.99
Sale price $35.99 Regular price
Unit price
GSC P-D Subaru Subaru EJ205/EJ207/EJ257 Chrome Polished Exhaust Valve - 33mm Head (+1mm) - SingleThis...

GSC P-D Subaru Subaru EJ205/EJ207/EJ257 Chrome Polished Intake Valve - 36mm Head (STD) - Single

Regular price $35.99
Sale price $35.99 Regular price
Unit price
GSC P-D Subaru Subaru EJ205/EJ207/EJ257 Chrome Polished Intake Valve - 36mm Head (STD) - SingleThis...

GSC P-D Subaru Subaru EJ205/EJ207/EJ257 Chrome Polished Exhaust Valve - 32mm Head (STD) - Single

Regular price $35.99
Sale price $35.99 Regular price
Unit price
GSC P-D Subaru Subaru EJ205/EJ207/EJ257 Chrome Polished Exhaust Valve - 32mm Head (STD) - SingleThis...

GSC P-D 4G63T Evo1-9/DSM 90-98 Chrome Polished Super Alloy Exhaust Valve - 31.5mm Head(+1mm) -SET 8

Regular price $257.99
Sale price $257.99 Regular price $284.29
Unit price
GSC P-D 4G63T Evo1-9/DSM 90-98 Chrome Polished Super Alloy Exhaust Valve - 31.5mm Head(+1mm) -SET...

GSC P-D 4G63T Evo1-9/DSM 90-98 Chrome Polished Super Alloy Exhaust Valve - 30.5mm Head(STD) - SET 8

Regular price $257.99
Sale price $257.99 Regular price $284.29
Unit price
GSC P-D 4G63T Evo1-9/DSM 90-98 Chrome Polished Super Alloy Exhaust Valve - 30.5mm Head(STD) -...

GSC P-D 4G63T Evo 1-9 / 90-98 DSM Chrome Polished Intake Valve - 35mm Head (+1mm) - SET 8

Regular price $167.99
Sale price $167.99 Regular price $177.83
Unit price
GSC P-D 4G63T Evo 1-9 / 90-98 DSM Chrome Polished Intake Valve - 35mm Head...
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