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Supra Human Feats – 1,000HP, Custom Widebody Toyota JZA80

Joshua Nepa’s one-off Mk4 Supra Turbo is the evolved archetype that his Mk5 aspires to.

Bob Hernandez
Dec 31, 2020
Photographer: Adam Cha

A few months back we brought you the story of Joshua Nepa's sinister-looking Pandem widebodied Toyota GR Supra fresh off its big 2019 SEMA Show debut, where it sat center stage in the Yokohama Tire booth. We learned then that Josh considers himself to be something of a Supra lover, and to prove the point he introduced us to this '98 Supra Turbo in his stable - an A80 to go with his A90.

Purchased in '09, Josh's MkIV obviously has a touch more history than his MkV. He found the Supra in Los Angeles being sold by its original and only owner in bone stock condition with zero modifications (like a gift from the car gods). Josh tells us he saw the online ad, traded in his Range Rover, and hopped on a flight to L.A. from his hometown, Phoenix, Ariz., to seal the deal.

Within a year he had the car's output up to 550hp, but after losing to a boosted Honda Accord one night, he decided he'd had enough and turned up the wick to over 900hp. The Supra has been red, and then snow camo, and then purple; it used to have its rivets exposed when it first started wearing its Rocket Bunny bits. In short, this iconic Toyota sports car has been through a transformation or three in the last 11 years, and where it sits now is a refinement of all those past lives.

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1,000HP By Mail

We've featured some pretty wild and unusual 2JZ swapped-vehicles over the years, but fabricator and tuner Andrew Carroll's Toyota-powered '72 Chevy El Camino might be the craziest. Andrew happens to be the Director of Operations at SupraStore.com in Florida, and when it came time to redo the 2J in Josh's Mk4 Supra, the owner entrusted its rebuild to Andrew. He kept displacement the same in the 3.0L but threw in some CP forged slugs in the bottom, as well as longer duration HKS 272 cams and Supertech valve springs and titanium retainers in the head.

The strengthening and big cam were in preparation for a bump in boost pressure once the engine was pieced together, courtesy of a big-daddy BorgWarner EFR 9180 single turbo upgrade. Helping manage system pressures are Tial wastegates and blowoff valves, with exhaust pushed out through 4-inch HKS plumbing and air coming in via GReddy intake. The Toyota straight-6 was also outfitted with 2,000cc fuel injectors and E85 conversion.

010 joshua nepa 1000hp custom widebody mk4 toyota supra turbo engine bay Photo 24/24   |   Supra Human Feats – 1,000HP, Custom Widebody Toyota JZA80

Pro Transmissions headed up the Stage-3 rebuild of the A80's Getrag V160 6-speed transmission, and for the increased power production the call was made for a burly RPS carbon twin-disc clutch and ACT flywheel. When Josh and his employee Jason had the bolt-on mods wrapped up, they handed off the AEM Infinity ECU tuning to Tony Szirka at UMS Tuning, who got the car to break the 1k horsepower threshold and also make 765 lb.-ft. or torque.

Hunkered Down

When we shot Josh's Supra, it was running a combo of Airrex and Accuair suspension components, but recently the system was updated; the Mk4 now rides on an Air Lift 3P/3H airbag setup installed by Aaron Hunt. The wheel choice is a bit of a throwback but stylized perfectly for this presentation, Work VS-XXs with custom neochrome lips and centers color matched to the Supra's exterior paint. The rollers are shod in some serious stickiness, too: Toyo Proxes TQ DOT drag radials.

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Sacrificial Bunny

While this Mk4's grunt is nothing to scoff at, the car's exterior is pretty original looking, implementing a variety of parts from a range of companies to accomplish the appearance. Josh says the A80 rocks a one-off Rocket Bunny kit that was cannibalized from the setup for the Scion FR-S and then fabricated to fit the Supra body. In between the work performed by his employee Jason and the guys over at West Motors, they got the body shaved, installed the Ridox front bumper cover, Veilside side skirts, TRD rear wing, and carbon hood. West Motors further molded in the Rocket Bunny fenders (deleting the rivets) and diffuser, and then tied everything together with PPG Deltron Ceramic Grey paint that bleeds onto the carbon hood and wheel centers.

Which leads us to the purpose of this car - because honestly, who builds a 1,000hp Supra and then puts it on bags and throws a giant stereo system into it? The owner who's a car-show guy, that's who. After 11 years with Josh, this Mk4 has barely added another 10k miles to the odometer, but it isn't for lack of attention. He says he's constantly changing the A80, with a new trunk setup and Garrett G42 turbo upgrade recently to go with the redone air suspension we mentioned earlier. He's hoping the car will see 1,300hp by the end of January, which might sound like a crazy number to some - but for fanatics like Josh, it's just another step to building the perfect Supra.

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By Bob Hernandez
951 Articles
Supra Human Feats – 1,000HP, Custom Widebody Toyota JZA80
Tuning Menu
Car: 1998 Toyota Supra Turbo
Owner: Joshua Nepa
Hometown: Phoenix, AZ
Occupation: Owner, Race Wars Arizona
Instagram: @Supra_Human
Power: 1,003 RWHP, 765 lb.-ft. of torque
Engine: Rebuilt 3.0L 2JZ-GTE; CP pistons; HKS 272 camshafts; Supertech valve springs, titanium retainers; BorgWarner EFR 9180 single turbo upgrade; twin Tial 44mm wastegates, dual 50mm blowoff valves; GReddy intake; HKS 4-in. titanium exhaust; 2,000cc injectors; E85 flex tune by UMS Tuning; AEM infinity ECU; Ken's Polishing complete engine polish
Drivetrain: ACT lightweight flywheel; RPS carbon twin-disc clutch; stage 3-built Getrag V160 6-speed transmission; TRD limited-slip differential
Footwork & Chassis: 6-point roll cage; Airrex double bellows bags; Accuair ENDO-CVT air tank, E-Level system management
Brakes:

Line Lock
Wheels & Tires: 18" Work VS-XX wheels with custom neochrome lips and color-matched Ceramic Grey centers; 315/35R18 Toyo Proxes TQ tires
Exterior: PPG Deltron Ceramic Grey paint and custom molded Rocket Bunny Scion FR-S fenders by West Motors; Ridox front bumper; color-matched carbon-fiber hood; carbon-fiber windshield cowl; Veilside side skirts; TRD rear wing with carbon-fiber center; shaved rear wiper; custom widened rear brake vents; molded rear diffuser; custom demon eyes by Automotive Lighting; custom LED taillights from the U.K.
Interior:

Status Racing carbon-fiber racing seats; Bride seat rails; Braum Racing wide 4-point harnesses; Seibon carbon-fiber door panels; custom carbon-fiber dash and rear trunk; Pioneer AppRadio 4 head unit; JL Audio 12W6 subwoofers, HD1200 and HD600 amplifiers; Kicker midrange speakers and tweeters

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