LS7 427" N/A - Nitrous Long Block
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$19,645.00Daily drivable 720hp is effortless with this 427” LS7. Starting up top with the cylinder heads, we install CHE precision manganese bronze valve guides before running our in-house CNC porting and assemble with your choice of quality components. Bottom end begins with your choice of trued and indexed 4.000” crankshaft with Callies Compstar or Ultra connecting rods. Custom forged Wiseco pistons fill the 4.125” cylinders that have been honed to perfection. No matter what you plan to power, this LS7 will provide miles of dependable service.
Displacement: | 427" | Bore: | 4.125" |
Power Output (HP): | 700HP | Stroke: | 4.000” |
Compression Ratio: | 12.0:1 | Camshaft Type: | Hydraulic Roller |
Max RPM: | 7400 | Oil System Type: | Wet Sump |
Port Configuration: | LS7 | Fuel Type: | 91-93 Octane Gasoline |
Block: | GM LS7 | Timing Chain: | Cloyes |
Crankshaft: | Callies 4340 Compstar Crankshaft w/ LME Blueprint Process | Lifters: | GM LS7 Hyd. Roller Lifters w/ GM Lifter Trays |
Connecting Rods: | Callies Compstar H-Beam w/ ARP 2000 7/16" Bolts | Push Rods: | Manley One Piece Chromoly 3/8" x .080” Wall |
Pistons: | Wiseco Forged Nitrous w/ Gas Ports | Rocker Arms: | GM LS7 w/ Trunion Modification |
Wrist Pins: | Tool Steel | Head Studs: | ARP 12pt. |
Ring Pack: | NPR Stainless Top (for high heat applications) Napier Second, 3mm Oil | Head Gaskets: | Cometic |
Bearings: | Clevite H-Series Main & Rods, Dura Bond One Piece Cam Bearing | Oil Pump: | Katech |
Main Studs: | ARP | Timing Cover: | GM LS2 Front w/cam Sensor |
Cylinder Heads: |
LME / Brodix CNC Ported & Prepared LS7 388cfm Int. / 266cfm Exh. |
Valley Cover: | GM LS2 |
Valves: |
2.200" Hollow Titanium Intake 1.600" Stainless Exhaust |
Oil Pan: | GM LS7 |
Valve Springs: | BTR Platnum Polished Dual Valve Springs, Titanium Locks and Retainers | Rear Cover: | GM LS7 |
Camshaft: | LME/Cam Motion Custom Billet Core | Balancer: | ATI 10% Over Drive SFI w/ ARP Bolt |