685 Black Label Crate Engine

SKU: 117-304

Item is in stock Only 0 left in stock Item is out of stock Item is unavailable

Engine pricing & lead times vary - please call 1-866-551-4916 for pricing & delivery estimate.

Click here to request a custom engine with our free engine quote questionaire.

Horsepower: 685 hp
Torque: 
580 tq
Streetability: 
Ok
Idle Quality: 
Rough/Choppy

Type: LS7 7.0L
Displacement: 427 Cubic Inches
Compression Ratio: 11.4:1
Bore x Stroke: 4.125 x 4.000
Rev Limit: 7250 RPM
Crank: Callies Forged
Rods: Callies H-Beam
Pistons: Mahle 2618 Alloy Pistons
Cam: Mast LS7 427 SS
Heads: Mast LS7 305 Black Label Heads
Intake Valves: Hollow Stainless
Exhaust Valves: Solid Stainless
Intake: MSD LS7 Intake
Valve Springs: Mast Premium Dual Springs

Mast Black LabelArtistic Craftsmanship Holds Hands to an Allegiance of Power

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

This LS7 engine family utilizes a Mast Motorsports engineered camshaft that is custom ground on a Mast Motorsports 3 bolt cam core. The 427 Black Label’s foundation is a fully machined GM LS7 aluminum block with a forged Callies rotating assembly with Mahle pistons that is topped off with Mast Motorsports Black Label LS7 305cc cylinder heads and MSD Atomic Airforce LS7 intake manifold. ARP fasteners are used throughout and Mast Motorsports Black Label pushrods ride on GMMP High RPM hydraulic roller lifters.  This hand built LS7 based engine utilizes a camshaft that has a strong lope that creates great mid and high RPM power for the customer that will be aggressively racing their vehicle but still wants to occasionally drive it on the street.

Cars powered by a Mast Motorsports LS7 427 Black Label Engine

 

 

 

This content type will accept rich text to help with adding styles and links to additional pages or content. Use this to add supplementary information to help your buyers.

You can use product metafields to assign content to this tab that is unique to an individual product. Use tabs to highlight unique features, sizing information, or other sales information.