Multiple U.S. Warehouse LocationsBroken ApexFree shipping on qualified orders over $100*
The Nitrous Express Holley High Ram plenum nitrous plate conversion bolts between the upper and lower intake manifold on Holley Hi‑Ram manifolds for a clean install. Injecting nitrous and fuel from the side of the runner provides near‑direct port distribution without spray bars in the runner, and passages are machined directly into the billet plate to avoid concerns about broken or spinning spray bars.
Nitrous Express Holley High Ram Plenum Nitrous Plate Conversion
