BC Brian Crower 272 & 280 Cams for EJ25 Subaru STi (BC0623/BC0624)
BC Brian Crower camshafts for the Subaru STi EJ257B are available in 2 different specs to suit your build. For the 2008 and up Impreza WRX STi, Subaru not only updated the chassis design, but also released a 2.5L engine with dual AVCS featured on both intake and exhaust camshafts. This engine is commonly referred to as the EJ257B platform. The STi is a series of low-volume versions with even greater power and grip were built by Subaru's in-house modifier, Subaru Tecnica International (STi). STi versions of the Impreza, which produced 280 PS (206 kW) from new, are often raced, largely unmodified, in the Group N class in various rally championships to great success. Introduced in 1994, the STi has proven to be a very popular high-performance machine in the Japanese domestic market.
Vehicle Fitment:
2008-2021 Subaru STi
(EJ257B with Dual AVCS)
Purchase Includes:
Pair of Intake and Exhaust Cams
Assembly Lube
Notes:
Picture is for reference.
Stage 3 cams require BC0600 Valve Springs and Retainers
| Part Number | Adv Dur | Dur @ .050 | Valve Lift (1:1) | Valve Lift (mm) |
| BC0623 | 272°/272° | 222°/222° | 0.400"/0.400" | 10.16/10.16 |
| "Stage 2" Street/Strip (272/272) Plug and play application. Short duration for nice street manners, slight lope at idle. Excellent all purpose spec. OEM spring OK. |
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| BC0624 | 280°/280° | 230°/234° | 0.425"/0.425" | 10.80/10.80 |
| "Stage 3" High Performance (280/280) Longer duration profile, added rpm potential. Intended for fully built engine. Tuning and ECU mods recommended. Requires kit BC0600. |
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More from BC:
BC high performance camshafts are ground on state-of-the-art CNC cam grinders to insure accuracy and tolerances to within .02mm. Every BC camshaft profile has been prototyped and dyno tested for proven horsepower results prior to placed into mass production. By grinding cores in high volume, Brian Crower, Inc. is able to pass the cost savings on to the end user. Quality at an affordable price.
BC uses small diameter grinding wheels during the finishing phase when applicable to generate a more aggressive ramp rate for a faster cylinder fill rate. More air + more fuel = more power. Although it takes longer to grind the cams, research and development has proven that the inverted radius created by the small grinding wheel on the opening side delivers more horsepower on radius and roller rocker applications than the conventional, large diameter grinding wheels.
All BC cams are checked on a high speed, sub-micron accuracy measuring gauge. The Adcole Camshaft Measuring System uses individual measuring heads for each cam journal and cam lobe, with .01 micron resolution, taking one datum point each 1/10th of a degree or 3,600 data points per revolution. Measuring camshafts for rise error and chattermark detection, this model can measure 200 parts per hour.
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