Diesel Performance Parts
4JJ1 Performance Exhaust Valves
4JJ1 Performance Exhaust Valves
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4JJ1 Performance Exhaust Valves
21-4N Stainless | Stellite Faces | Suits 4JJ1-TC & TCX
Performance exhaust valves for the Isuzu 4JJ1, made for the high temperatures, high stress and corrosive chamber conditions a tuned diesel lives in. If the head is off a worked D-MAX or Colorado, this is what should go back in.
Construction
- One-piece forged 21-4N stainless steel bodies (non-magnetic)
- Stellite welded valve faces
- Fully nitride hardened bodies
- Induction-hardened 4Cr9Si2 stem tips, friction welded
- Swirl-polished underside radii to the valve face for better flow and chamber swirl
- 30° back-cut up to the valve face
Fitment
- 4JJ1-TC and 4JJ1-TCX
- Rodeo, Colorado and D-MAX to 05/2014
- D-MAX 06/2014 to 08/2020
- MU-X 12/2013 to 08/2020
- N Series 10/2007 on
Shipping & Payment
- Free Express Shipping Australia-Wide
- Buy Now, Pay Later: Afterpay, Humm, Klarna & Zip
Frequently Asked Questions
Q: Are these intake or exhaust valves?
A: Exhaust. The Stellite-welded face is specific to the exhaust side, where heat load is highest.
Q: Do they need machining?
A: They suit the 4JJ1 head, but a proper seat cut and clearance check by your machinist is part of any valve job.
Built for the Heat a Tuned 4JJ1 Makes
DPP performance exhaust valves for the Isuzu 4JJ1-TC and TCX. 21-4N stainless, Stellite faces, nitride hardened. Free express shipping Australia-wide.
Disclaimer: Common Rail Cowboys is not affiliated with Isuzu Motors, General Motors or Holden. Engine components require professional machining and assembly.
