PPE Performance 304 Stainless Steel Engine Coolant Return Pipe (Polished) For 01-04 LB7 Duramax blow off valve upgrades this resonator has the size

this resonator has the size and internal volume to make a real difference in tone

If you have a modified valve body or aftermarket transmission

Steed Speed T4 Straight Competition Manifold For 1998

Installing the Rudy's rear housing support can keep your four wheel drive housing from cracking

PPE Performance 304 Stainless Steel Engine Coolant Return Pipe (Polished) For 01-04 LB7 Duramax blow off valve upgrades this resonator has the sizeSpecifically designed for use in conjunction with the factory thermostat housing. 304 stainless steel construction prevents corrosion compared with OEM mild steel pipe which is prone to rusting and eventually leaking. Allows for installation of factory turbo coolant return thermostat. Also great for marine applications. GM Equivalent P N: 97226868 Fitment: 2001 2004 Chevy GMC 6. 6L LB7 Duramax Diesel