Cosworth High RPM Valve Springs are the result of countless hours of engineering, testing and validation ensuring the best possible spring for high performance applications. Cosworth High RPM Valve Springs are wound from the world’s finest Japanese Kobe steel and feature dual chamfered ends to reduce wear on seats and retainers. Each spring has been engineered with increased seat pressure along with higher lift capability for optimum performance potential and improved valve control. Single spring design allows easy installation with no machining required and is perfect for typical high performance use.
Large diameter valves are essential for improved air flow. Cosworth high performance intake valves are produced from high quality stainless steel for maximum durability. Exhaust valves are machined from Inconel for high temperature (2400 F) reliability. Each valve features swirl polished back for improved air flow and dished face for additional weight reduction. Cosworth high performance valves are compatible with Cosworth Ultra Race Valve Spring kits.
High Performance Valve Train | |
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Subaru | |
KK3839 | Subaru EJ25 STi (2.5L) Ultra-High RPM Dual Valve Spring / Titanium Retainer set |
20000166 | High RPM Single Valve Spring set (16)Subaru WRX STi EJ25 (2.5L) EJ20 (2.0L) |
SB0034 | Valve, Inlet +1.0mm Subaru EJ25-Stainless Steel (37.0mm) |
SB0033 | Valve, EX +1.0mm Subaru EJ25-Inconel (33.0mm) |
PR7710 | Subaru EJ25 (2.5L)Graded Cam bucket 4.50 |
PR7711 | Subaru EJ25 (2.5L)Graded Cam bucket 4.52 |
PR7712 | Subaru EJ25 (2.5L)Graded Cam bucket 4.54 |
PR7713 | Subaru EJ25 (2.5L)Graded Cam bucket 4.56 |
PR7714 | Subaru EJ25 (2.5L)Graded Cam bucket 4.58 |
PR7715 | Subaru EJ25 (2.5L)Graded Cam bucket 4.60 |
PR7716 | Subaru EJ25 (2.5L)Graded Cam bucket 4.62 |
PR7717 | Subaru EJ25 (2.5L)Graded Cam bucket 4.64 |
PR7718 | Subaru EJ25 (2.5L)Graded Cam bucket 4.66 |
PR7719 | Subaru EJ25 (2.5L)Graded Cam bucket 4.68 |
PR7720 | Subaru EJ25 (2.5L)Graded Cam bucket 4.70 |
PR7721 | Subaru EJ25 (2.5L)Graded Cam bucket 4.72 |
PR7722 | Subaru EJ25 (2.5L)Graded Cam bucket 4.74 |
PR7723 | Subaru EJ25 (2.5L)Graded Cam bucket 4.76 |
PR7724 | Subaru EJ25 (2.5L)Graded Cam bucket 4.78 |
PR7725 | Subaru EJ25 (2.5L)Graded Cam bucket 4.80 |
PR7726 | Subaru EJ25 (2.5L)Graded Cam bucket 4.82 |
PR7727 | Subaru EJ25 (2.5L)Graded Cam bucket 4.84 |
PR7728 | Subaru EJ25 (2.5L)Graded Cam bucket 4.86 |
PR7729 | Subaru EJ25 (2.5L)Graded Cam bucket 4.88 |
PR7730 | Subaru EJ25 (2.5L)Graded Cam bucket 4.90 |
PR7731 | Subaru EJ25 (2.5L)Graded Cam bucket 4.91 |
Nissan | |
20002550 | Nissan VQ35 (3.5L) Ultra-High RPM Dual Valve Spring / Titanium Retainer set |
20000163 | High RPM Single Valve Spring set (24)Nissan VQ35 (3.5L) |
20000168 | High RPM Single Valve Spring set (16) Nissan SR20DET (2.0L) |
20000169 | High RPM Single Valve Spring set (24) Nissan RB26 (2.6L) |
PR7602 | Valve, Inlet +1.0mm Nissan VQ35-Stainless Steel (38.15mm) |
PR7603 | Valve, Ex +1.0mm Nissan VQ35-Inconel (32.35mm) |
Mitsubishi | |
KK3813 | Mitsubishi Evo 4G63 (2.0L) Ultra-High RPM Dual Valve Spring / Titanium Retainer set |
20000164 | High RPM Single Valve Spring set (16)Mitsubishi Evo 4G63 |
20007182 | Mitsubishi Evo 4B11T Ultra-High RPM Dual Valve Spring / Titanium Retainer set |
20004845 | High RPM Single Valve Spring set (16) Mitsubishi Evo X 4B11T |
PR7500 | Valve, Inlet +1.0mm Mitsubishi 4G63 Stainless Steel (35.0mm) |
PR7501 | Valve, Ex +1.0mm Mitsubishi 4G63-Inconel (31.5mm) |
BMW MINI | |
20000167 | High RPM Single Valve Spring set (16)BMW MINI Cooper/Cooper S (1.6L) |
PR7612 | Valve, Inlet +1.25mm BMW MINI-Stainless Steel (31.5mm) |
PR7613 | Valve, Ex +1.25mm BMW MINI- Inconel (24.5mm) |