Clinton Performance Machine
CPM offers engine block and cylinder head machining services as well as custom engine assembly.
09/17/2026
406 LS long block for a Supercharged C6 Corvette. S**t 4” stroke crankshaft, K1 rods, CP pistons, PRC Heads.
09/14/2026
Aftermarket aluminum Gen 3 Hemi block freshly decked and machined for wire o’rings.
08/20/2026
Yesterday it was O’rings in blocks and today it’s heads. Figure eight O’rings in Coyote heads that are being used with copper gaskets. The figure eight pattern keeps the ring away from the large chamber. This isn’t the most common way to machine grooves in decks as it was done on our boring machine using a reference plate.
08/19/2026
Wire O’rings in the decks on a sleeved aluminum Coyote block and an iron Coyote Werewolf block.
08/18/2026
In the past week we’ve had an abundance of cylinder heads through the shop. Most of them were here for complete rebuilds. That meant everything from pressure testing, replacing seats, valve guides, valves, valve springs, valve jobs, resurfacing and more. A total of 19 cylinder heads in just over a week. Everything from Gen 3 Coyotes, GT 350, 4 Valve Modulars, LS, Gen V LT, Honda F20 and K24, and Kia/Hyundai. Id like to give a big THANK YOU to Mike And Kenny here in the shop for making quick and accurate work of all the cylinders heads. Just a few pictures of the cylinder head work from the past week below.
08/17/2026
Three short blocks we finished up last week.
1. 406 cubic inch LS in an iron block. Crank cans rods from K1 and pistons from CP. This will be finished out as long block in the near future and then it’s headed into a supercharged Corvette.
2. 352 cubic inch 8.2 deck SBF built in a Summit/BPE aftermarket block. LPC forged crank and rods, and Mahle PowerPak pistons. This is going in a Fox Mustang drift car.
3. 467 cubic inch tall deck BBC. A customer brought this in for a rebuild and we reused the Eagle crank and rods and provided a new set of Mahle PowerPak forged pistons.
08/10/2026
Fresh set of 03 Cobra heads with new exhaust guides, new exhaust seats, Ferrea Valves and the 4 thread stock spark plug threads updated with aluminum thread inserts.
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Address
8006 Old Alexandria Ferry Road
Clinton, MD
20735
Opening Hours
| Monday | 8am - 5pm |
| Tuesday | 8am - 5pm |
| Wednesday | 8am - 5pm |
| Thursday | 8am - 5pm |
| Friday | 8am - 5pm |
| Saturday | 8:30am - 12pm |