Crower cams for the 02-05 EJ20 WRX and 04-07 EJ25 STI are made from new billet cores, they are not regrinds. Crower cams require zero head modification for installation in the USDM EJ20 and EJ25 cars, other than the valve springs and retainers required with some of the more aggressive grinds. Designed to suit a multitude of applications, Crower cams are available in four off-the-shelf grinds for the 02-05 WRX and the 04-07 STI, though custom grinds are available for those looking for more than these offerings provide.
Stage 1 Cams Street use with emphasis on bottom end and mid range power. Works with stock springs up to factory rev limiter.
RPM Range: Idle to 7000+
Advertised Duration (Seat): Int: 256° / Exh: 256°
Duration @ .50": Int: 216° / Exh: 216°
Gross Lift: Int: .380" / Exh: .380" (9.65mm)
Stage 2 Cams Best cam choice for a daily driver. Delivers excellent top end without loosing low end torque. Spring kit 84185 is recommended. Specs:
RPM Range: 1000 to 7500+
Advertised Duration (Seat): Int: 264° / Exh: 264°
Duration @ .50": Int: 220° / Exh: 220°
Gross Lift: Int: .400" / Exh: .400" (10.16mm)
Stage 3 Cams Designed for street/strip applications and features a slight lope at idle and great top end power. Requires spring/retainer kit 84185. Specs:
RPM Range: 1250 to 8000+
Advertised Duration (Seat): Int: 272° / Exh: 272°
Duration @ .50": Int: 228° / Exh: 228°
Gross Lift: Int: .406" / Exh: .406" (10.31mm)
Stage 4 Cams Drag Race and radical Street/Strip. Requires #84185 spring kit and compatible ECU upgrade for optimum results. Rough idle. Requires spring/retainer kit 84185. Specs:
RPM Range: 1500 to 8500+
Advertised Duration (Seat): Int: 280° / Exh: 280°
Duration @ .50": Int: 234° / Exh: 234°
Gross Lift: Int: .415" / Exh: .415" (10.55mm)
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