Subaru Parts

Carrillo Connecting Rods are manufactured from a proprietary steel; manufactured and forged to custom specifications. After experimenting with virtually every other reasonable material; Carrillo found a chromium/nickel/vanadium/molybdenum-forged alloy to be the best product to meet the stringent requirements of performance motors. Through out the manufacturing process Carrillo rods are inspected and measured to uphold high quality standards. When you go with Carrillo you go with quality. These rods are sold PER PIECE as replacement or for test fitment purposes. Learn More

The original sheet metal timing belt guide flex from belt deflection when subjected to extreme rpms causing timing belt to skip or more teeth on crankshaft sprocket. Cosworth Billet Timing Belt Guide developed to control this problem is machined from solid aluminium with a hard anodized finish. Includes mounting hardware. Learn More

Used mounting cam angle sensor to front of North American Spec cylinder heads. Useful adapting cylinder heads to Japanese European market engines. Learn More

Large diameter valves essential improved flow. Cosworth high performance intake valves produced from high quality stainless steel maximum durability. Exhaust valves machined from Inconel for
high temperature (2400 F) reliability. Each valve features swirl polished back improved flow dished face additional weight reduction. Cosworth high performance valves compatible with Cosworth Ultra
Race Valve Spring kits. Learn More

Large diameter valves essential improved flow. Cosworth high performance intake valves produced from high quality stainless steel maximum durability. Exhaust valves machined from Inconel for
high temperature (2400 F) reliability. Each valve features swirl polished back improved flow dished face additional weight reduction. Cosworth high performance valves compatible with Cosworth Ultra
Race Valve Spring kits. Learn More

The piston is of most important components within engine. It be subjected to directional change up to times every second must withstand acceleration forces of 8500gs. Cosworth high performance forged pistons designed engineered to withstand this type of punishment still perform. Cosworth's pistons manufactured using same methods as Formula pistons include features such anti scuff skirt coating; ultra-strong pins; polished and patented antidetonation bands. Additionally; each application uses a unique forging to minimize weight ensure strongest possible piston design.
Key Features
Unique forgings each application
Xylan anti scuff skirt coating
Polished tops (reduces carbon build up relieves stress)
Manufactured from proprietary alloy (CosAl 010)
Ultra strong pin
Patented anti-detonation bands Learn More

Cosworth High Performance engine assemblies the perfect basis your high performance application. Each version gone through countless hours of engineering evaluation to determine best combination of parts build specification; ensuring maximum reliable performance. Each Cosworth High Performance enginembly starts with new select components as foundation of performance build. Every block is thoroughly inspected before cylinders honed to perfection. We then balance rotating assembly that includes either a factory forged crankshaft or Cosworth Billet crank along with Cosworth Forged connecting rods; Cosworth Tri-Metal bearings Cosworth Forged Pistons. motorsport grade parts then professionally assembled by expert engine builders in Cosworth enginembly facility. Each High Performance enginembly includes a complete specification sheet listing critical dimensions along with a serialized plaque. maximum performance; combine with a Cosworth ported Valve Cylinder Head camshaft set.
Subaru EJ25 High Performance Short Block 2.5L
The Cosworth EJ25 is an excellent starting point high performance track applications.
New Subaru EJ25 EJ257 Block
New Subaru EJ25 Forged Crankshaft or Cosworth Billet Crank (79mm)
Cosworth Forged H-beam connecting rods
Cosworth Forged Pistons (99.5mm) rings
Cosworth Tri-metal bearings
Balanced to within .5 gram
Complete blue-print assembly
Ring set
Bearing clearance checked
Deck height checked
Connecting side clearance checked
Crankshaft float checked
Mitsubishi 4G63 (Evolution VII-IX) High Performance Short Block 2.0L
The Cosworth 2.0L 4G63 is an excellent starting point high performance track applications.
New Mitsubishi 4G63 Evolution Block
New Mitsubishi forged crankshaft (88mm)
Cosworth Forged H-beam connecting rods
Cosworth Forged Pistons (85mm) rings
Cosworth Tri-metal bearings
Cosworth Heavy Duty main studs
Piston squirt jets
Balanced to within .5 gram
Complete blue-print assembly
Ring set
Bearing clearance checked
Deck height checked
Connecting side clearance checked
Crankshaft float checked
Mitsubishi 4G63 (Evolution VII-IX) High Performance Short Block 2.2L
The Cosworth 4G63 2.2L stroker engine combines perfect bore to stroke ratio; yielding potentially gains in torque while still allowing engine to rotate produce power at higher rpms.
New Mitsubishi 4G63 Evolution Block
New Cosworth Billet Crank (94mm)
Cosworth Forged H-beam connecting rods
Cosworth Forged Pistons (86mm) rings
Cosworth Tri-metal bearings
Cosworth Heavy Duty main studs
Piston squirt jets
Balanced to within .5 gram
Complete blue-print assembly
Ring g Learn More

A addition to range of thermal management cooling system upgrade components; Cosworth LowTemp Motorsport Thermostats engineered to precisely control engine temperature in demanding condits found in typical motorsport use. Each Cosworth LowTemp Motorsport Thermostats is manufactured to highest standards includes a unique feature that accurately controls coolant flow to prevent temperature coolant surge that cause engine damage. Learn More

Cosworth's been engineering camshafts nearly 50 years. That coupled with years of innovative multi valve cylinder head design ensures camshaft designs the most efficient in providing maximum usable power across widest power band. Each is ground from a billet finished using same procedures we in extreme level race engines. Cosworth camshafts the perfect compliment to CNC Ported Valve Cylinder heads. cams profiled to increase boost response thereby increasing engine torque power are fully compatible with CNC Ported Valve Cylinder Heads.
Key Features
Ground from billets
Engineered tested profiles
Broad power band
Compatible with Cosworth ported Valve Cylinder Heads Learn More