XDP XD386 Performance Valve Springs & Retainer Kit 01-16 GM 6.6L Duramax SB-76-1007 Adding two more solenoids allows

Adding two more solenoids allows each trumpet to have a dedicated air source for dramatically increased flow and a train horn that will push your Demon over the edge

The part time operation model works by monitoring your boost

ARP uses a premium grade 8740 alloy that is rated far superior to aircraft quality

including Models 30301 or 30302

This kit features a digital gauge

XDP XD386 Performance Valve Springs & Retainer Kit 01-16 GM 6.6L Duramax SB-76-1007 Adding two more solenoids allowsAdd performance, durability, and longevity to your Duramax by upgrading with this complete valve spring and retainer kit from XDP. The XDP Performance Valve Spring & Retainer Kit features a conical design for better valve control over the standard straight spring. The conical design also allows for smaller and lighter spring retainers. Each spring undergoes a stress relief process and is computer load mapped to ensure quality and long term