CJS Performance Engineering

02/09/2026

Testing our Small Block Pro Stock Hemi heads. Sized for 380-400ci this is our “Small” port.

01/09/2026

Custom 4-1 SS304 Collectors

31/08/2026

Custom spacer to suit EFI Hardware throttle body.

28/08/2026

Twin Blade anti reversion shear plates rolling out.

27/08/2026

News on some of our new products as well as updated staple items like our 4150 Modular spacers. We are adding these to our website shortly.

[email protected]

25/08/2026

Big port lower air speed or smaller port with higher speed?

Development on our SB2.2 Engine. Testing and measuring as we go. Air speed at 400+ CFM is looking good.

25/08/2026

Customer requested a specific chamber shape and modification. Here we are.

21/08/2026

Baseline on our SB2.2 heads. We’ll work on improving the whole combination and test some of our new parts. Theory and the real world don’t always see eye to eye.

.2

Jimmy Sideris

20/08/2026

Some of our new products & our constant pursuit of better finishes. Our goal is to design and manufacture products that make HP, are functional and also look great.

13/08/2026

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We design & machine billet parts for the auto racing industry. All designed, prototyped and machined in house.