1975 Porsche 911S Coupe IROC Tribute 3.0L Twin-Plug
Ended
Final bid:$102,000
Categories: Air-Cooled
Auction type: ReserveEnded
15 bids

Vehicle Details


  • Year: 1975
  • Make: Porsche
  • Model: 911S
  • VIN: 9115201982
  • Mileage Shown: 9,943mi (TMU)
  • Transmission: Manual
  • Title Status: Clean
  • Color: Green
  • Seller Type: Private Party
  • Location: Cedar Rapids, IA 52411
  • Lot #: V-0048977

This 1975 Porsche 911S Coupe has been reimagined as a tribute to the legendary 911 Carrera RSR race cars from the early International Race of Champions (IROC) series. Finished in green, it features IROC-style bodywork, flared fenders, a custom lightweight interior, 17” RSR-style wheels, and various race-focused upgrades. The flat-six engine has been enlarged to 3.0 liters, equipped with 46 PMO carburetors and twin-plug ignition, and mated to a 915 5-speed manual transmission, along with several additional mechanical enhancements. This street-legal homage is now available for auction by its seller out of Iowa.

The bodywork was modified between June 2009 and April 2010 with wide fenders, IROC-style bumpers, and an IROC-style rear wing. As part of the restoration, this Coupe was refinished in the current shade of green by Darrin Wood's Body Shop in Toney, Alabama, and preserved by full exterior paint protection film. It rides on 17” deep-dish Fuchs-style wheels with newer rear tires that have been driven for approximately 400 miles. Detailed images are provided in the gallery.

The black interior has been prepared for racing with a pair of leather-upholstered Recaro bucket seats, a MOMO Prototipo quick-release steering wheel, a roll cage, Rennline footrests, and a tilted tachometer gauge. Additionally, the headliner has been reupholstered, and Dynamat heat and sound insulation has been installed beneath the carpeting.

The flat-six engine has been enlarged to a 3.0-liter displacement and equipped with 46 PMO carburetors and twin-plug ignition. Power is delivered to the rear wheels through a 915 5-speed manual transmission. Additional enhancements include an RSR-spec oil cooling system, front and rear IROC race suspension, M&K 911R mufflers, new fuel lines, and a race-grade Fuel Safe fuel cell. The seller notes an oil change was completed in August 2023, and the car has been driven approximately 300 miles since. 

This sale will include a clean title and some documentation.

The seller would like you to know: "I've driven the car approximately 500 miles during my ownership of just over a year. Joe's Garage in Milwaukee, Wisconsin, thoroughly inspected the vehicle and addressed everything that required attention. The car is in excellent condition and ready to drive, needing nothing."

Auction Results

  • Highest Bid: $102,000
  • Auction End: Oct 08, 2024 07:18:26PM UTC
  • Number of Bids: 15
4,081 views232 saves

Comments (33)

  • PCARMARKET 6 daysago

    Highest Offer Received $105,000.00

  • MikeB7411 1 monthago

    Bid in the amount of $102,000

  • Mccullum1 1 monthago

    Bid in the amount of $100,000

  • Lambogas 1 monthago

    Bid in the amount of $97,911

  • MikeB7411 1 monthago

    Bid in the amount of $95,911

  • Bartlola 1 monthago

    Bid in the amount of $85,250

  • lilygrahm 1 monthago

    Bid in the amount of $85,000

  • Lambogas 1 monthago

    Bid in the amount of $82,500

  • lilygrahm 1 monthago

    Bid in the amount of $80,000

  • Mccullum1 1 monthago

    Bid in the amount of $70,000

  • Bartlola 1 monthago

    Bid in the amount of $65,000

  • ChadEggs (seller) 1 monthago

    Cooling system is a special Iroc RSR cooling system , front mounted . Troysport installed a compleat race suspension F&R , Bushings are all like new. RSR coil over struts ,

  • Dorsel00 1 monthago

    Bid in the amount of $45,000

  • MaikoR 1 monthago

    Bid in the amount of $37,911

  • Dorsel00 1 month, 1 weekago

    Bid in the amount of $35,000

  • ChadEggs (seller) 1 month, 1 weekago

    @Upshift4 Im currently out of town, I’ll be back tomorrow night see if i can find you these answers. There is a book that has all the documentation of the build.

  • Upshift4 (registered bidder) 1 month, 1 weekago

    Thanks, is there any front oil cooler? Is the diff open or ltd slip? And if yes, which one? I see wevo shifter , what brand of shocks? Lowers spindles? Bushings New? And what kind? Sway bars? Tie rods?

  • ChadEggs (seller) 1 month, 1 weekago

    @Upshift4 Wilwood four wheel disc , m and k. Mufflers , coil over suspension tophat mono balls , about 300 hp at flywheel , weight 2200 lbs

    A lot more info on the bat listing. A lot of pictures of before the build that i had no idea existed untill Alcantara pointed out.

  • uscarrera 1 month, 1 weekago

    Bid in the amount of $30,000

  • Upshift4 (registered bidder) 1 month, 1 weekago

    i'm with Helix10. need info on suspension, brakes trans. etc. dyno please

  • ChadEggs (seller) 1 month, 1 weekago

    The rears are steel , front fiber glass
    Lime green , same color as the Iroc car

  • Cmohr56 (registered bidder) 1 month, 1 weekago

    So are the rear flairs steel or fiberglass ?

  • Al_Cantara 1 month, 1 weekago

    @ThePorscheDoc

    The bringatrailer suction listing states fiberglass fenders and bumpers. Presuming fenders means the front fenders. Typical
    for a track car.

    The “race” seats were removed, these are
    vintage repro seats .

  • tcmiami305 1 month, 1 weekago

    Bid in the amount of $5,911

  • Al_Cantara 1 month, 1 weekago

    Lime Green was an original IROC color. So that's a cool characteristic of this tribute.

    https://www.rennbow.org/articles/the-colors-of-iroc

  • ThePorscheDoc (registered bidder) 1 month, 1 weekago

    Steel or fiberglass, fender flares?

  • ChadEggs (seller) 1 month, 1 weekago

    @Helix10 The fuel cell was purches new and put in new 8/15/23 , With a few other repairs / fixes / by joes Garage in Milwaukee. Ill see if i can get the other info for you

  • ChadEggs (seller) 1 month, 1 weekago

    @SILOmike Not sure ill see if i can locate it

  • ChadEggs (seller) 1 month, 1 weekago

    @Al_Cantara No i did not buy form the seller on Bat , my Broker found it for me. Selling due to 45 in my collection , i need to down size my fleet . I work a lot and don’t have time to drive my cars.

  • Al_Cantara 1 month, 1 weekago

    @ChadEggs

    Why are you selling after so little time and mileage?

    Did you buy from the previous seller?

    https://bringatrailer.com/listing/1975-porsche-911-23/

    Thanks. Looks nice at first glance.

  • Helix10 (registered bidder) 1 month, 1 weekago

    Do you have undercarriage photos? Suspension details (t-bar size, monoballs, swaybar sizes etc)? Is the 915 an open diff or LSD (if LSD OEM or other). Age of fuel cell and bladder? Looks like Wilwood brakes up front how about the rear? Presents as a very nice build just missing details. Thank you.

  • SILOmike (registered bidder) 1 month, 1 weekago

    What is that shade of green?

1975 Porsche 911S Coupe IROC Tribute 3.0L Twin-Plug
Final bid: $102,000 Highest Offer: $105,000 Ended
Close
Close
You're disconnected from PCARMARKET. We're trying to get you back online. A poor Internet connection can affect your ability to see bids and comments. If the problem persists, try reloading the page.
You are using a very old and unsupported browser. Your browser is likely missing important security fixes. Some features of this site may not work. Upgrade your browser to a version supported by its manufacturer, or use the latest version of Google Chrome.
X