CJS Performance Engineering

CJS Performance Engineering All designed & machined in-house for maximum performance & reliability.

CJS Performance Engineering, with 35+ years of racing experience, designs & manufactures high-quality billet aluminium and steel parts for the motor racing industry and enthusiasts.

03/06/2026

John Pilla from PowerHouse Engines testing the hell out of this Holden 355.
Some great results that come through thorough testing and analysis.

25/04/2026

Now shipping to the USA. 3-5 day service door to door. Contact us for details. ✈️✈️

23/04/2026

Constantly developing and testing our products to leave any competition behind.




23/04/2026

Holden 355 with CJS Cylinder Heads & our Billet Modular Carb spacer specifically designed for dual plane manifolds. Solid flat tappet camshaft and pump fuel.

Engine built by Steve Koukouletas at Tuff Toys Garage.

04/03/2026

Our new Billet Bracket to mount a Moroso Enhanced design vacuum pump to Holden. Part number BKT1300 is to suit passenger side mounting. Mounts for driver side coming shortly.

03/03/2026

Can’t fix what you can’t measure.
Checking every aspect of our rocker bars and making sure the geometry is where it needs to be.

02/03/2026

Checking rocker geometry on our CNC machined steel rocker bars to suit early Holden V8 heads. It takes time to design something that provides the correct location, sweep and range of motion to provide optimal performance.




17/02/2026

Go to our main page for tech info and various dyno tests. There is also a tech talk on Carb Spacers pinned at the top of the page & a link in the comments.

30/01/2026

Some of our Billet Carb Spacer offerings. We also have them to suit 4500 Series Dominators as well as Quadrajet.

Address

4/53 Macaulay Street
Williamstown North, VIC
3016

Opening Hours

Monday 9am - 5pm
Tuesday 9am - 5pm
Wednesday 9am - 5pm
Thursday 9am - 5pm
Friday 9am - 5pm

Website

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