Supercars Unlimited

07/09/2025

We wrote and first published our book '4-4-2 By The Numbers' back in 1991 and have added to it over the years. Now in its third (and final) printing, we have some copies left. 4-4-2 By The Numbers covers in detail: casting numbers and stamping codes as used on 1965-1972 400 and 455s. As well as transmission (AT & MT) and differential codes. Trim tag and VIN code breakdowns and more are also part of the book. 54 pages, 28 detailed photos. To get your copy, send $25.95 (cont. US customers) - includes Priority mail postage to: Greg Rollin 759 NE Jackson St., Hillsboro OR 97124.

02/28/2025

My apologies for all the spam that keeps getting posted here.

02/02/2024

I'm sorry to report that due to medical/health issues, after 35+ years of selling Cutlass/4-4-2 parts exclusively, we are shutting down. I would like to thank each and every one of you for your patronage over these years. Not to mention the friendships that have developed along the way.

Sincerely,

Greg Rollin.

01/01/2023

04/07/2021

April Special!

04/01/2021

Available April 1st, we are proud to announce our new 455 Four Cylinder Conversion Kit! By eliminating cylinders 3, 4, 5 and 6, you can expect your gas mileage to increase by as much as 50%! This kit includes all of the major components required - piston set (4 dummy & 4 functioning), special camshaft, 4 intake port block off plugs and special distributor cap. All other components are standard 455 items.
Perfect for those who don’t want all that horsepower and torque from one of our 455 Rocket Rebuild kits. Priced just slightly higher than our #14-342 455 Rocket Rebuild kit, this conversion kit will pay for itself in fuel savings alone in no time at all!

03/06/2021

Sideways Saturday!

02/09/2021

We (finally) had a chance to update the 'Photos' section of our website - check it out!