Ford Racing R125 Mustang: 360 HP 347 Stroker Street Fastback

Caecey Killian November 2, 2026 3 min read 0

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Ford’s racing history turns 125 this year, dating back to Henry Ford’s upset win in his Sweepstakes race car in 1901. Instead of another carbon-winged race car, Ford Racing marked it with a 1966 Mustang fastback you could build in your own garage. The Ford Racing R125 Mustang runs a 347-cubic-inch small block, Edelbrock EFI and a TREMEC five-speed, and the major pieces come out of the Ford Racing Parts catalog.

That last part is the story. It’s a parts-counter build with a factory badge, and it rolls into the 2026 SEMA Show this week alongside another Ford we’re chasing, Trick Rides’ carbon fiber F100 with a supercharged Coyote.

The Ford Racing R125 Mustang Wears The Race Team’s Colors

Ford dressed the fastback in the same black, red, and gold livery as its 125th anniversary IMSA Mustangs. A gold R125 roundel sits on each door, a Ford Racing stripe runs across the decklid, and a small 347 badge on the front fender tells you what’s under the hood. Gold five-spoke wheels finish it off.

The body lines stay stock, so from 50 feet away it reads as a clean ’66 fastback. Up close you spot the roll bar and the tan interior.

A 347 Stroker Small Block With Edelbrock EFI

The R125 makes 360 hp and 400 lb-ft from a Ford Racing 347-cubic-inch crate engine. It’s built on a Ford Racing Boss block with aluminum cylinder heads, and an Edelbrock Pro-Flo EFI system feeds it. A stroked 302 is about as proven as Mustang street combos get.

A 347 gives you real low-end torque without the bills of a big-inch build, and port injection means no choke to fiddle with on a cold morning. Ford topped it with a set of its two-piece valve covers, which use swappable top plates and built-in spark plug wire looms.

TREMEC TKX Five-Speed And Modern Manners

The Ford Racing R125 Mustang sends power through a TREMEC TKX five-speed manual. Ford says it fits with very minimal floor pan modification. That’s good news for anyone who has cut and hammered an early Mustang tunnel to squeeze in an overdrive box.

Ford says the car was built for modern drivability. A first-gen fastback weighs far less than a new Mustang, so 360 hp is plenty.

Why This Build Matters To Mustang Builders

Plenty of SEMA cars run four-digit horsepower on parts you’ll never see on a shelf. The Ford Racing R125 Mustang is a recipe you can order. Ford hasn’t posted a full parts list with part numbers or a build cost yet, so we’ll be chasing those details on the show floor.

Got a tired 289 fastback under a cover in the garage? Study the Ford Racing R125 Mustang. Same small-block Ford family, a five-speed that goes in without a Sawzall, and 360 hp you can drive to cars and coffee. Prefer a new car? The Mustang Dark Horse SC is Ford’s other answer.

Frequently Asked Questions

Photos courtesy of Ford Racing.

AboutCaecey Killian

Caecey Killian covers builds, installs, and product features for Car Junkie Magazine. He has spent years on the floor of the garage chasing horsepower across SBC, LS, and modern muscle platforms, and that shop time runs through every article he writes. His current CJM project is Project Street Reaper, a 1976 Camaro built around a fresh SBC 350. He is also known for Project Mighty Mouse, a 1977 Chevy Nova running a 1962 small-journal 327 SBC, with build coverage published across multiple online automotive magazines. His media background spans long-form build documentation, install coverage, and product features across the magazine and the Car Junkie Magazine YouTube channel. He writes the way he wrenches: specific, honest about the mistakes, and grounded in real garage work.

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