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The official club for enthusiasts of the

1970 & 1971 Oldsmobile Cutlass Supreme SX


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Bob Peters
SX455 Club President
E-mail Bob Peters


Dues paying members only
Phone 702.580.8907
(10am-8pm PST)


 Become an Annual Member
Join by Mail

 Send $25 Check
Payable to: SX455

(Click link to print form)

SX455 Membership Form



Car Above: SX455 Member David Menke of Rockford. MI - 1970 Cutlass SX L-33
As of November 17, 2020 there are 760 cars in the Cutlass SX Registry
In 1970 Oldsmobile introduced a new Cutlass Supreme options called the SX Performance Package. The Y-79 code featured several 455ci engine options, a 400 Turbo Hydra-matic transmission, a cutout rear bumper with dual exhaust, special SX badges on the fenders and other goodies not found on a standard Cutlass Supreme. Order the right engine options and you had a 442 in disguise and avoided the high muscle car insurance premiums. At minimum you would own a rare muscle car that would only be available in 1970 and 1971.

The SX455 Club is the official resource for all things Oldsmobile Cutlass SX. Since 2005, Bob Peters and a group of dedicated Cutlass SX enthusiasts and gurus have documented all things related to the Cutlass SX. This includes information on how to identify a real Cutlass SX, every magazine article published, official factory and dealer documents, options codes and color combinations and so much more. No other Oldsmobile web site contains the amount of content for one particular model as

SX455 is a treasure trove for any Oldsmobile or muscle car enthusiasts...and you don't need to own a Cutlass SX to join and access all the content on this web site.

We also manage the The Cutlass SX Registry - locating and documenting Cutlass SX cars since 2005 and collecting a history about each individual car as ownership changes.

The production numbers for this two-year-only (1970 & 1971) model are less than half of the highly collectable Oldsmobile 442 models, plus many of the Cutlass SX cars were sent to the junk yard crusher before the car became collectable. Finding or seeing a Cutlass SX is rare, even at the largest Oldsmobile Club of America annual nationals meet.

ALL 1970 and 1971 standard Cutlass Supremes and the Cutlass SX models had same basic VIN codes, so identifying a real Cutlass SX can be difficult. This website will help you identify a real Cutlass SX.

If you are thinking about purchasing a Cutlass SX, do your research before you make an offer.

The Cutlass SX is certainly a unique and rare General Motors muscle car, and will continue to gain in popularity and value as more collector car enthusiasts discover the Cutlass SX. Sophisticated styling, luxury options and big block performance make the Cutlass SX a great gentleman's muscle car.
Oldsmobile and other car enthusiasts will find the content on this website interesting, informative and entertaining. You do not need to own a Cutlass SX to join If you own a Cutlass SX you can add your car to the SX Registry at no additional charge when you join the club. 

After you join SX455, you'll receive a User Name and Password that will give you access to all the thousands of pages of content on this web site.

Dues paying SX455 members will find detailed information on how to identify a real Cutlass SX via our Spotter Tips and Tech & Spec pages. Your find production numbers, exterior and interior color combinations, options and codes, the SX Price Guide and so much more. There are 25 Oldsmobile factory and dealer memos, build sheet samples and other rare documents. You can read every magazine article ever published about the Cutlass SX dating back to 1970. View the SX Member Directory, photos more! We invite you to join SX455.

If you own a Cutlass SX, when you join SX455, you'll be able to add you car to the official Cutlass SX Registry by answering a series of questions about your car. Non SX455 members can also add your car to the SX Registry for free - see link to the form at the bottom of this page.

JOIN TODAY and gain access to ALL the information on the SX455 Web site!

Online Memberships Options (Visa, MasterCard, AMEX)

Annual SX455 Club Membership $25. For Cutlass SX Owners
SX455 Members get their car added to the official SX Car Registry. You'll get a User Name and Password to access ALL site content, data, Olds factory documents, literature and Cutlass SX magazine articles. You can upload photos of your car to your member profile page and more!

One Year Web Site Access 
$25. For non Cutlass SX owners

You will get a User Name and Password to access ALL the data on the web site. If you are thinking about buying a Cutlass SX be sure to check out the Spotter Tips, Tech and Spec Section and Price Guide of the site. Plus see tons of Olds factory documents, literature and articles filled with great information. DO YOUR RESEACH BEFORE YOU MAKE AN OFFER!

Register Your Cutlass SX $10. Add your car to the SX455 Registry + 30 Day Site Access

The SX455 Club documents all 1970-1971 Cutlass SX cars. Since Oldsmobile did not keep records on these cars, registering your Cutlass SX helps our continued efforts to document and maintain a history of these rare cars. Register your Cutlass SX and you'll receive a User Name and Password allowing you one month access to ALL the info, literature and data on this site.

SX Reseach: 30 Day Web Site Access $15. For non Cutlass SX owners is the ultimate Cutlass SX resource. You will receive a User Name and Password giving you access to all the data on this web site. Discover how to identify a real Cutlass SX via the Spotter Tips and Tech & Spec info. Access official GM literature, magazine articles, build sheets, and other data. Plus you can post questions to the Message Board. Tons of great content for any car hobbyist or Oldsmobile enthusiasts!

SX455 Membership Form

Add your Cutlass SX to the Official SX Registry by printing, completing and returning the form

FREE SX Car Registry Form