Performance Crankshafts — Billet 4340, Forged, OE & Stroker
The crankshaft is the heart of your rotating assembly. When you're building for higher horsepower, more boost, or sustained high RPM, the factory cast crank becomes the weak link. Performance crankshafts in 4340 billet steel, forged steel, or counter-weighted stroker configurations let you hold serious power reliably. SP Engineering stocks crankshafts for every major performance platform. Authorized dealer since 1996, worldwide shipping from California.
Crankshaft brands we carry
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Brian Crower — 4340 billet cranks for Honda K20/K24, Subaru EJ, Nissan SR20, Toyota 2JZ, Mitsubishi 4G63
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Manley Performance — Pro Series and Turbo Tuff cranks for LS, Coyote, Hemi, Ecotec
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K1 Technologies — forged 4340 and twin-pin offset stroker cranks
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Eagle Specialty — cast and 4340 forged options for budget builds
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Carrillo — premium billet 300M steel for race-only applications
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Callies Performance — Magnum, Compstar, Ultra series for LS, Hemi, Coyote
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Tomei — JDM-built billet cranks for RB26, RB28, SR20, 4G63
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Nissan OEM, Toyota OEM, Honda OEM — factory replacement cranks
Most popular engine platforms
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Honda / Acura — K20A, K20C, K24, B-series, F20C (S2000)
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Nissan — VR38DETT (R35 GT-R), RB26DETT (R32/R33/R34 Skyline), SR20DET, VQ35/VQ37
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Subaru — EJ20, EJ25 (WRX/STI), EJ257, FA20 (BRZ)
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Mitsubishi — 4G63 (Evo IV–IX), 4B11T (Evo X), 6G72 (3000GT)
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Toyota — 2JZ-GTE (Supra MKIV), 1JZ, 3SGTE, 4U-GSE (GR86)
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Ford — Coyote 5.0L, 4.6L/5.4L mod motor, EcoBoost 2.3L & 3.5L
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GM LS — LS1/LS2/LS3/LS7/LSA/LS9, LT1/LT4
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Mopar Hemi — 5.7L, 6.1L, 6.2L Hellcat, 6.4L SRT
Stroker kits explained
Stroker cranks increase displacement by lengthening the stroke. Common examples: Honda K20 stroked to 2.5L (K20+K24 hybrid), Subaru EJ255 stroked to 2.6L, Nissan RB26 stroked to RB28 or RB30, Toyota 2JZ stroked to 3.4L. More displacement = more torque off boost, faster spool, meaningful power gains across the rev range. We stock complete stroker kits with matched pistons, rods, and bearings from BC, Manley, K1, Tomei and JE.
How to choose
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OE-replacement (cast/forged factory): high-mileage rebuild, stock power target, OEM reliability
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4340 forged steel: good for ~800–1,000 whp, daily-driver capable
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4340 billet (twin-pin): 1,000–1,500+ whp, race-prepared, professional rebuild required
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300M / Aermet billet: 1,500+ whp drag and time-attack builds, specialty bearings required
Need a complete rotating assembly?
Email info@sp-power.com with your engine, power target, and intended use (street, drag, road race). We'll spec a complete bottom-end — crank, rods, pistons, bearings, ARP studs — from matched components with verified clearances.
Trusted Performance Specialists Since 1996.
