800hp Time Attack WRX STi

If the old expression is true that an ounce of preparation is worth a pound of cure, a gram of experience is worth a metric ton of both, as it applies to building popular late-model Japanese imports into race cars. While plenty of race-winning recipes are have been well documented over the years, the world of time-attack—a take on circuit racing where clocking the fastest lap in a given class is all that matters—is still very much a developing discipline. Thankfully, we have the experience (mistakes, chronic failures, eventual successes) of racer/builders like Mark Jager and his 2006 Subaru WRX STI to learn from.

Engine Build

Outfront Motorsports closed-deck block; SoCal Porting ported cylinder heads; Supertech Performance valvetrain; GSC Power-Division S2 camshafts; K1 Technologies crankshaft; Wiseco BoostLine connecting rods; 10.0:1-compression JE Pistons; Cusco engine mounts; BorgWarner EFR 9174 turbocharger; AEM intake; Full-Race turbo manifold, up-pipe, down-pipe; Yimi Sport custom exhaust; Vibrant Performance front-mount intercooler; custom Armstrong Race Engine Systems dry-sump oiling system; Purol oils; Fuel Injector Clinic 2,150cc/min fuel injectors; Aeromotive Pro-Series fuel pump, fuel rails; AEM boost pressure, oil pressure, oil temperature monitoring, AQ1 data logger; Koyo radiator, oil cooler; GrimmSpeed four-port electronic boost controller; Cobb Accessport V3; Yimi Sport Tuning engine tuning

Subaru six-speed manual transmission; ACT six-puck clutch and Prolite flywheel; OS Giken front and rear differentials

800hp Time Attack WRX STi

Exterior Modifcations

18×10.5-inch Yokohama Advan Racing RGIII wheels; 295/35-18 Hoosier A7 tires

WASP Composites front lip splitter; custom Yimi Sport flat-bottom and rear diffuser; APR GTC-1000 swan-neck rear wing, tuned by Ramitha “Rami” Edirisinghe

Sabelt GT-300 seat, six-point harness, steering wheel, quick-release hub; Pierce Motorsports roll cage; K1 RaceGear fire suit, gloves, shoes; Hans device

800hp Time Attack WRX STi

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