RCH-S120 Spec 1 Head Set Subaru EJ205 $3250
RCH-S125 Spec 1 Head Set Subaru EJ255/EJ257 $3250

Spec 1 cylinder heads feature 5-axis CNC porting, STi lighweight valves, uprated valve springs, and titanium valve retainers. Stock valve sizing maintains good flow velocity at low rpms. Ideal for street performance use. Sold outright. No core return required.

RCH-S220 Spec 2 Head Set Subaru EJ205 $3600
RCH-S225 Spec 2 Head Set Subaru EJ255/EJ257 $3600
RCH-S24G Spec 2 Head Mitsubishi Evo 4G63 $3750

Spec 2 cylinder heads are for maximum performance applications and are fitted with oversized valves (inconel exhaust). CNC porting, high rpm valve springs, titanium retainers. Sold outright. No core returns required.
RCC-EJ20 Performance Cam Set Subaru EJ205 $949
RCC-EJ25 Performance AVCS Cam Set Subaru EJ255/EJ257 $999
RCC-4G63 Performance Cam Set Mitsubishi 4G63 $599
Performance camshaft sets designed for strong power gains across the powerband. Recommended for use with heavy duty valve springs.

ARP-S4701 Subaru Head Stud Kit EJ20/EJ25 DOHC $279
ARP-M4702 Mitsubishi 4G63 (MY94+) $159

Cylinder head studs improve head gasket sealing and reduces distortion by providing more consistent clamping pressure compared to head bolts.

RST-0137 STi Timing Belt (all turbo models) $210

Kevlar reinforced timing belt ensures precise cam timing and reliability under extreme competition use. Belt is marked for easy installation.

RCH-4264 Head Gasket Set EJ25 (1.1mm) $149
RCH-4264B Head Gasket Set EJ25 (0.78mm) $149

RCH-4261 Head Gasket Set EJ20 (1.1mm) $149
RCH-4261B Head Gasket Set EJ20 (0.78mm) $149

New improved design. Viton coated multi-layer steel construction now featuring die-cut construction and a special folded reinforcement around each combustion chamber for maximum sealing reliability.

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