M&Y Automotive & Diesel Machine Shop

04/13/2026

For sale
C15 Acert Longblock
Completely remanufactured.

04/13/2026

C15 Acert NXS Longblock available now.
Message us or call for pricing

03/19/2026

Built for power. Engineered to last. Upgrade today.

03/05/2026

Caterpillar Longblock & engine building 💪

03/04/2026

Message us for pricing

02/09/2026

Stage 3 Longblock out the door!
C15 Lower Compression build
As brand new as it gets!

02/06/2026

Stage 3 C15 Longblock

What’s Included:

• Fully machined block with precision counterbores and a new surface finish
• Polished crankshaft
• Brand-new inframe kit
• M&Y Stage 3 C15 cylinder head featuring Inconel intake valves & a high strength casting.
This package delivers exceptional value without cutting corners. If you’re looking for a C15 longblock that has been made to better level performance and reliability—this is it.

02/06/2026

We want to build your next Longblock 💪🏽

01/27/2026

For sale
Cummins ISX15
550HP EGR is deleted. We’re waiting on plates to come in.

01/21/2026

01/21/2026

YES! We build engines.
Every engine is built with precision as the top priority.
We completely machine our blocks and heads back to OE specifications - cutting counterbores and resetting every critical surface so each engine gets a true, brand-new life.