6.6L L8T Gen V LT Cast Iron Block, Fully Machined

Boostline Performance proudly introduces our premium line of machined 6.0L GM engine blocks - precision-engineered for serious performance builders who demand reliability under extreme conditions.

Perfect for the customer who wants to build their own engine and needs a good foundation to start with.

Each block starts as a seasoned Genuine GM L8T Engine Block then undergoes our proprietary machining process on state-of-the-art Rottler CNC equipment.  These blocks get fully machined (Zero Decked, Bored to your specification and Torque Plate Honed at our facility on our Rottler CNC machines. 

Whether you're building a street monster or an all-out competition engine, our flexible options accommodate bore sizes from 4.070-4.100", giving you maximum flexibility for your specific displacement goals.

Features:

• Allows 1000+ HP Builds (NA and/or Power Adder)
• Drilled Inter-Bore cooling holes for excellent cooling between the cylinder heads and block
• 9.240 in. Standard Deck Height
• 1-Piece Rear Main Seal
• Use only with LT1 - style cylinder heads
• OEM GM Main Caps
• Bore Sizes Available from 4.070” to 4.100”
• Bored To Your Specified Bore Size And Torque Plate Honed
• Zero Decked
• Comes With New Cam Bearings Installed