2001-2016 GM 6.6L Duramax Up-pipes Bolt Set (12pcs)Duramax: LB7, LLY, LBZ, LMM, LML (2001 2016)Features: OEM design with washers. Thread length increased to accommodate washer thickness. Two screws are 5 mm longer to accommodate the downpipe mounting bracket. Our design preserves thread engagement whereas other companies do not. All 12 screws will be alloy steel 12 point screws in black oxide finish, class 12. 9. (10) M10 x 1. 5 x 32 bolt and washer(12) M10 washers(2) M10 x 1. 5 x 37 bolt and washer

Corrugated fins that give more surface area and more thermal transfer

complete shim kit

quality stainless steel spring-loaded T-Bolt clamps and heavy-duty 5-ply polyester reinforced silicone couplings ensure a secure install

the BedTred material is fade and UV resistant

Speed Limiter

Our 5 axis machine Y-bridge requires less setups than a 3 axis machined part

The verification process/equipment we use is very untypical of a standard diesel repair shop and allows us to look at many more system performance characteristics beyond average fuel output

Quick Connect Fittings

The internal heat sinks channel oil and prevent sloshing

4x 1/8” Aluminum Rivets

Authentic OE gaskets

It's outlet is hydro-formed to smoothly transition and match the S400 turbine inlet