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Replacement Engines & Longblocks

BRAND NEW OEM MERCURY MERCRUISER LONGBLOCK-377 PART #800-866138A06

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Harley-Davidson LongBlock Program | Harley-Davidson USA

MMR Street Mod 1000SE 4.75 4V Longblock

This forged MMR longblock can handle up to 1000HP. They include the MMR
with Manley Forged Pistons, 4340 MANLEY
Forged H-Beam Rods w/ARP bolts, forged crankshaft fully balanced and
blueprinted in a Brand new 03/O4 Cobra Block, and fully assembled with new 03/04 Cobra heads , ARP head studs,MMR/Felpro head gaskets,
and a High Volume oil pump.

MMR Street Mod 1500SE 4.75 Liter 4V Longblock

This forged MMR longblock can handle up to 1500 RWHP. They include the MMR
with Manley Forged Pistons, 4340 Forged
Billet I-Beam Rods w/ARP 2000 bolts, forged crankshaft fully balanced
and blueprinted in a Brand new 03/O4 Cobra Block

Options:

VW Engine Longblock - Air-cooled Engines for VW

Longblock Chart

New GM Marine Longblocks - Daddy O's Marine Engines

MMR Street Mod 900

This forged MMR longblock can handle up to 900HP. They include the MMR
same parts as the MMR900SE shortblock with Manley Forged Pistons, 4340 MMR
Forged H-Beam Rods w/ARP bolts, forged crankshaft fully balanced and
blueprinted in a Brand new 03/O4 Cobra Block, and fully assembled with NEW 03/04 Cobra heads , ARP head studs,MMR/Felpro head gaskets,
and a High Volume oil pump.

This 100% new longblock from MMR features the, BOSS 302 CNC ported cylinder heads, BOSS 302 camshafts and springs, Fully assembled with new factory ford timing chains rockers and lifters and oil pump. Handles up to 1000 RWHP. Includes 1 year warranty.