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Full Send Late Model Performance
550 Performance Street Engine
$ 15,495.00

550 Performance Street Engine


Only left in stock

Horsepower: 550 hp
550 tq
Idle Quality: Smooth Noticeable Lope

Type: LS3 6.8L
Displacement: 416 Cubic Inches
Compression Ratio: 11.2:1
Bore x Stroke: 4.065 x 4.000
Rev Limit: 7000 RPM
Crank: Callies Forged
Rods: Callies H-Beam
Pistons: Mahle Pistons
Cam: Mast LS3 416 HO
Heads: Mast Black Label LS3 255
Intake Valves: Solid Stainless
Exhaust Valves: Solid Stainless

Intake: LS3 Car Intake
Valve Springs: PAC Racing Dual Springs

*All hp numbers will be within 2% of the advertised number.  

Mast Motorsports Handbuilt LS engines feature the best components and are assembled by professional machinist.  All handbuilt engines feature ARP Main Studs, ARP Head Bolts, and a balanced and blueprinted block.  

The 550 Performance Street Engine has a Mast Motorsports engineered camshaft that is custom ground on a Mast Motorsports billet cam core.  The 416 foundation is a honed and decked LS3 aluminum block with a 4.000” forged Callies rotating assembly with Mahle pistons that is topped off with Mast Custom Cast heads and an LS3 intake manifold.  ARP fasteners are used throughout and Mast pushrods ride on LS7 hydraulic roller lifters.  The 550 Performance Street Engine is the first release of a diverse line of Mast Motorsports hand built Turnkey Crate Engines that are designed for the Hot Rod/Muscle Car market.  The 550 Performance Street Engine peaks at the 550+ horsepower mark and is competitively priced for such a powerful complete fuel injected turnkey crate engine. 

- JK Jeep Swaps
- Classic Hot Rod's
- Daily Drivers