D&J Precision | 24V Cummins 115LB Valve Springs

Our HD 115lb 24v Cummins Valve Springs have been proven with years of testing. We have seen over 120psi of boost on one of our Stage 3 cylinder heads with these springs. These are the same valve springs we included standard on our Stage 1, Stage 2, Stage 3 and Stage 4 performance cylinder heads and come in all non-roller ENFORCER engines.

We recommend using our 24v cummins titanium retainers when over 4400rpm or 1000hp.

*Spring retainers not included.