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EJ257 / EJ255 CAMSHAFTS 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. Introduced to the United States in 2004, the US model STi features the larger displacement 2.5L (EJ257) that features AVCS. These camshafts will also fit the 2006-2007 GDF/GDB/GDG WRX and STi Impreza (also known as the V9 or "Hawk Eye") in the UK.
Stage Description Part# Adv. Dur. Dur @ .050 Lift (in) Lift (mm) Kit# Cam Card Dyno Shop Status
Street/Strip Specification
Plug and play application. Short duration for nice street manners, slight lope at idle. Excellent all purpose spec. OEM spring OK.
BC0621 272°/272° 222°/222° .400"/.400" 10.16/10.16 BC0600 In-Stock
Street/Strip Specification
Added lift profile with faster action ramps for quicker spool up rates. Tuning and ECU mods recommended. Requires BC0600 kit.
BC0620 276°/276° 232°/232° .422"/.405" 10.72/10.29 BC0600 In-Stock
Race Specification
Longer duration profile, added rpm potential. Intended for fully built engine. Tuning and ECU mods recommended. Requires kit BC0600.
BC0622 280°/280° 234°/234° .425"/.425" 10.80/10.80 BC0600 In-Stock
USDM EJ257 ('05-up STi) Stock 256°/256° 204°/208° .378"/.385" 9.60/9.78
JDM EJ254 Stock 256°/256° 211°/209° .374"/.371" 9.50/9.42
Bucket Diameter: 1.200"
Note: Intake camshafts are setup for AVCS operation. The above cams WILL WORK with AVCS. If running non AVCS setup is desired, you must install the four set screws (located in a plastic bag attached to the cam bag) in the front of each intake cam (dowel pin side) using a 2.5mm Allen wrench and LocTite. This will not allow oil to actuate the Active Valve Control System. These cams do not fit the 2008-up STi with dual AVCS.
EJ257 / EJ205 Adjustable Cam Gears
BC adjustable cam gears deliver the easiest way to dial in more horsepower and/or torque without getting underneath the valve cover, disassembling the engine or dealing with onboard electronics. BC gears are CNC machined from aerospace grade, 6061-T6 billet aluminum for ultimate tensile strength. Easy to read, laser etched face features micrometer style markings for precise adjustment (up to 10 degrees in each direction) and quick tunability. Each hub is held down by six Grade-8 hex bolts for maximum clamping ability. Hard anodized finish prevents premature surface wear.
Part # Description Instructions Buy Now Status
BC8860 Adjustable Cam Gears for Subaru EJ205 and EJ257 - Set/4 In-Stock
BC8860-EX Adjustable Cam Gears for Subaru EJ205 and EJ257 Exhaust Side Only - Set/2 In-Stock
BC8860B All Black ADJUSTABLE CAM GEARS w/ARP Fastener Bolts - (Subaru EJ205 - WRX / EJ257 - STi) - Set/4 In-Stock
Note: Torque the cam gear bolts, the 5 adjuster bolts, to 10-12 ft lbs.
BC cam bolts for the EJ Series engine platforms are made from ARP2000 material and feature a silver CAD plated finish to eliminate corrosion from handling. Hardened to RC 45-47, the new BC cam bolts secure the cam gears permanently without the stretch common with OEM fasteners. Reduces the risk of the gear coming loose and causing severe engine damage. Works with all brands of camshafts and cam gears. The BC bolt features OEM thread pitch and under head length. Sold as one unit. BC8898 pictured to the right.
Part # Description Buy Now Status
BC8898 Non AVCS Cam gear bolt ARP2000 material - 1 bolt In-Stock
BC8899 AVCS Cam gear bolt ARP2000 material - 1 bolt In-Stock
619.749.9018 ph
619.749.9128 fx
Some products listed are not legal for sale or use on emission controlled motor vehicles, RPM ranges vary on application.Warranty Information Copyright © Brian Crower Inc. All rights reserved..   Follow runBC on Twitter     
WARNING: This product can expose you to chemicals, including Chromium (hexavalent compounds), lead and lead compounds, which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information, visit www.p65warnings.ca.gov