ATK Performance 331 Stroker Shortblock, forged
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SKU: ATK-SP13
Part# SP13
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ATK Performance 331 Stroker Shortblock, forged
This shortblock is a great starting point for a naturally aspirated or boosted street engine capable of 500+hp. Assembled and ready to bolt on your heads, cam, intake etc. Here's the specs.- Block: Seasoned OE Roller Block
- Bore/Stroke: 4.040 x 3.250
- Displacement: 331 C.I.D.
- Crankshaft: SCAT Nodular 3.250" Stroke 1 Piece Seal Externally Balanced 28oz.
- Connecting Rods: Scat 4340 Forged I Beam 5.400 w/ARP 8740 Bolts
- Pistons: Forged +11cc Flat Top w/4 Valve Reliefs
- Piston Rings: Moly Rings
- Compression Ratio: 58cc=9.6:1/64cc=9.0:1
- Camshaft Bearings: Installed and Clocked to OEM Position
- Freeze Plugs: Brass Installed and Sealed
- Oil Galley Plugs: Installed and Sealed
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