2007-2010 LMM Dual 4" Outlet Downpipe-Back No Muffler

• Fits all 2007.5 - 2010 LMM Duramax

H&S racing exhaust kits are designed for maximum flow, with straight piped sound! Our kits for the 6.6 LMM Duramax will leave the competition in the smoke!

When you're ready to take your 6.4 to new heights, go with an off-road exhaust system from H&S Performance!

• Free flowing 4" DUAL mandrel-bent pipes
• Dual outlets
• No more clogged DPF's that could end your day at the track early
• No more outrageous EGT's that can damage your motor and cause premature wear and tear
• Bolt-On Design, No cutting or welding necessary
• Replaces entire exhaust system from downpipe to tail pipe

• 4" DUAL aluminized piping
• No muffler
• Factory flange inlet
• All hangers are pre-welded on
• All clamps, hardware, etc.
• Installation instructions

• Does NOT include Tips
• No Bungs! There are no exhaust sensor bungs in this kit
• This kit requires an H&S Tuner to work correctly, order separately
• ALL DPF delete kits will cause a Check Engine Light unless installed in conjunction with an H&S Tuner
• Check out our Frequently Asked Questions

There are NO threaded Bungs welded into this exhaust! H&S exhaust kits are designed to work with H&S Tuning, which require NO sensors to be re-installed into the exhaust.