2004 Porsche (996.2) 911 GT3 Cup (Supercup) - $98,000

Listed By GlenShelly
Private Seller - GlenShelly
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Item Details

Ad Number184157401


2004 Porsche (996.2) 911 GT3 Cup (Supercup)
Blue / Green / Gray Exterior
White Interior
Former K-Pax Racing Car #24 “Relish”
20,055 Kilometers
Estimated 10-Hours on Current Engine
3.8-Liter Custom Engine based on 2007 World Challenge Core
6-Speed Manual Transmission
Originally German Market Porsche Motorsport Supercup Car
Imported to United States in 2005
Chassis Number: WP0ZZZ99Z4S698081
SCCA Pro Racing Certified 2005, Passport Number 000308
40mm Factory Cage
435 Horsepower / 100 Hour Endurance Build
GT3 Cup Engine Number PMNA #610
996 Supercup Case 996.101.198.0R / 996.101.197.0R
996 Cylinder Housings 996.101.311.3R
Ported Intake
Custom Exhaust
World Challenge Tune w/ 3 Cockpit-Selectable Maps
Heavy Duty Racing Clutch
Custom Gearing
JRZ Motorsport Double-Adjustable Remote Reservoir Coilovers
Cockpit Adjustable Brake Bias
Brembo 6-Piston Front Brakes
Brembo Front Rotors
Porsche GT3 / Cup 4-Piston Rear Brakes
Brembo Rear Rotors
Racetech 4009WHR Wide Head Restraint Seat
FIA 8855-1999 Homologated, Date April 2011
Sparco Quick Disconnect Steering Wheel w/ Push to Talk
6-Point Schroth Harness
Window Net
MoTec Sport Display w/ Selectable Pages
Dash-Mounted LED Redline Display
Motorola 2-Channel Radio
Internal / External Main Battery Switch
Internal / External Fire Suppression Switch
2-Channel Cockpit / Engine Fire Suppression
Fire Sense 4lb Bottle, 2019 Service Date
Air Jacks Staubli JAC06 Air Jack System
Odyssey Battery (dated 6-25-17)
Removable Front Splitter
Adjustable GT3 Cup Rear Wing
BBS Cup Magnesium Monoblock RE 794 Wheels w/
Michelin Porsche Cup N2 Tires
BBS E88 Wheels w/
Michelin Porsche Cup N1 Tires (some flat spots)
BBS Magnesium Monoblock RE795 5-Lug Wheels w/
Michelin Porsche Cup N1 Tires


For the 996 Generation, Porsche Motorsports continued supporting the single-marque Supercup tradition with the 996 GT3 Cup Type I and 996 GT3 Cup Type II 911s. The cars were factory built racecars constructed specifically for the then Porsche Michelin Supercup series (now called Porsche Moblie 1 Supercup), an international Formula 1 support series. The allotment of 996 GT3 Cup cars built for Supercup were the premier GT3 Cup cars available, built under the exacting standards of Porsche Motorsport to meet the stringent requirements of the Supercup rulebook. Many of them eventually found their way into other areas of Porsche Motorsport, trickling down to domestic Porsche Carrera Cup series or being modified for other bodies of sports car racing. The 996 GT3 Cup set the standard for a factory-constructed racecar, exemplifying the traits that have always defined Porsche as a marque and let to its legendary success in motorsport.


This 2004 Porsche 911 GT3 Cup was originally a Porsche Michelin Supercup car. Mikey Wong of Porsche Motorsports North America confirmed it as being delivered in by Porsche Motorsport in Germany, after which it found its way to the United States. The trail for the first two years is vague. In 2005 it was raced in SCCA SPEED World Challenge, which is confirmed by SCCA Pro Racing sticker number 1974. There is speculation that team At Speed raced it in 2006, possibly driven by Randy Pobst in the later races of the season, but we have not been able to independently confirm this nor is there an SCCA Pro Racing sticker for that year. The known trail picks up in 2007 when K-Pax Racing campaigned it from 2007 through 2009 in its current colors as a trio of 911 GT3 Cup racecars. The trio of 911s consisted of “Mustard,” a 997 GT3 Cup numbered 22, “Ketchup,” a 997 GT3 Cup numbered 23, and this car: “Relish,” numbered 24 driven by Robb Holland. It can be seen wearing its current colors and number on May 24, 2007 at Round 4 of SPEED World Challenge at Charlotte Motor Speedway at the 25-minute mark here: https://www.youtube.com/watch?v=8NG8dy-6Mp0. It finished 10th in that race, behind teammate Randy Pobst, who came in 3rd in the 22 “Mustard” car. In 2010 it was sold by K-Pax Racing and passed through several privateer owners who raced it Porsche Club of America (PCA) GTA-1 club racing. It landed with the current owner in 2014, a local vintage racing enthusiast who we are selling it on consignment for. His collection includes many Porsches, along with several other racecars.

When the current owner took delivery of the car, he set about restoring it to race-ready condition to use a track-day enthusiast car. The engine was in need of an overhaul and sent to Gordon Friedman at Autometrics Motorsports. Friedman identified the engine as being consistent with a 3.8-liter 2007 World Challenge build and rebuilt it to the same spec, but with an emphasis on a compromising durability and horsepower. The build detailed in the outline above is constructed for 435-horsepower and a 100-hour TBO (time before overhaul) with three selectable ECU maps. A receipt for the build with itemized parts is included in the records. There are an estimated 10 hours over four track days on it. The gearbox was overhauled and re-geared at the same time as the engine by Stan Richardson of GBOX of Erie, Colorado. A heavy duty racing clutch was also installed at the same time. Porsche specialists JDX Racing in Loveland, Colorado prepared the remainder of the car.

On Friday July 31, 2021, Randy Pobst reviewed the GT3 at High Plains Raceway prior to the Rocky Mountain Vintage Racing / Morgan Adams Foundation Race Against Kids’ Cancer the following weekend. He recounted racing a 996 GT3 for team At Speed for the final round of the 2006 SPEED World Challenge season at Mazda Laguna Secca Raceway on October 22, 2006. He won that race in a drag race to the finish on the final lap, beating Venezuelan Ricardo Imery by fractions of a second. Pobst stated to the owner that the Venezuelan “Kept bumping into me and trying to run me off the track” during the final laps of their battle to the finish. There is speculation that this GT3 may have been that car—but this is pure conjecture, as we have not been able to independently verify this and there is no SCCA Pro Racing sticker from 2006 on the cage next to the others. Pobst did, however, drive the GT3 in 2020 on the day before the event, posting a 1:57 lap time at High Plains Raceway, driving conservatively in traffic with other much slower vintage racecars. He commented that the car was setup well and reminded him of its former SPEED World Challenge spec, although the current tires had better grip than those permitted in the mid-2000s. Before leaving Pobst also autographed the hood.

Regardless of its unknown tenure in the 2005 and 2006 seasons, this 996 GT3 Cup is a piece of history as a glimpse of an era of greatness for Porsche Motorsports, and GT sports car racing. In many ways the 996.2 GT3 is the most GT3 of them all. It is the lightest, most visceral, and most unapologetic 911 GT3. In the 996 GT3 cup there were no driver aids—not even ABS—which meant that hard work and bravery were required to extract the limit of performance from the car. This example has been well preserved and properly restored with fresh components and a low-time engine, the sum of which rivals the cost of a modern GT3 Cup build. Although it is no longer competitive in current Porsche Motorsports competition, it is extremely relevant in the evolution of the current 911 GT3 Cup and a rare surviving example of a recently refreshed track ready 996 GT3 Cup.

Glen Shelly is a low-volume auto brokerage focused only on the highest quality vehicles. We are airline pilots, mechanics, and auto enthusiasts who bring a high level of professionalism and attention to detail to the automobile business. Our philosophy is to keep our inventory small so that we can focus on thorough mechanical and cosmetic preparation of the vehicles we select. We have more than 20 years of experience restoring and repairing automobiles and are intimately familiar with our cars. We do the inspections, service, and corrective maintenance using only OEM parts and service manuals. We offer an informed and low-pressure sales environment, resulting in a premium buying experience. Find out more about us at www.Glenshelly.com.

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ERIE, CO 80516
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