
Who else could crack all the high-tech behind the all new 6.6L Duramax LML but the DPF Delete Geniuses at H&S Performance? Presenting the 5" Cat-Back DPF-Delete Exhaust without Muffler for your 2011-2012 Chevy/GMC 6.6L Duramax LML — engineered to look and sound just like the off-road racing monster it’s been dying to be! Designed for closed-course racing, the 5" DPF-Delete Exhaust replaces the Diesel Particulate Filter with free flowing 5" aluminized steel mandrel-bent pipes — so no more clogged DPFs to end your day at the track early. It’s time to step up your game and leave the others behind.
Key Features
- Huge free flowing 5" mandrel-bent pipes!
- Bolt-On Design — No cutting or welding necessary
- Replaces exhaust system from catalytic converter to tail pipe
- Removes the DPF – reducing damaging EGT’s and premature engine wear & tear
- Includes step by step instructions for optionally removing the DEF/UREA tank
- Requires a Duramax LML compatible H&S tuner — XRT Pro, Mini Maxx or Black Maxx to work correctly
- The Excellent customer service & support for which H&S Performance is known
The H&S Tuners: XRT Pro, Black Maxx & the Mini Maxx
H&S exhausts are designed for maximum flow with straight-piped sound. You can be sure these mandrel-bent pipes flow better than anything else out there, and sound even better! When used with one of the 2011-2012 Duramax LML compatible H&S tuners — Mini Maxx or Black Maxx — the 5" DPF-Delete will not throw error codes or trigger the Check Engine Light. When you’re ready to take your 6.6L Duramax LML-powered truck to new performance heights while making it look good — an off-road exhaust system from H&S Performance is in your future! Not only will you feel the difference on the track, you’ll hear it too! Recently H&S installed the DPF-Delete exhaust kit -– with their Black Maxx tuner set to *"Hot!" Listen to this!
Consider including a 5" inlet x 6" outlet x 15" long Rolled Angle cut stainless steel universal tip for a clean & crisp look to complete this groundbreaking exhaust system. This tip is bolt on for an easy & secure installation.

This is a Race Only product used solely for competition. Its use is limited to closed-course racing that is formally sanctioned by a recognized racing organization. Any other use, including recreational off-road use, could be in violation of local, state and federal laws (see notes below). Removal of the DEF/UREA tank standard in all 2011 6.6L Duramax LML’s is recommended but NOT required when running H&S Performance DPF-Removed Tuning.

Notes:
- All DPF-Delete kits will engage the Check Engine Light unless they are installed in conjunction with an H&S Tuner.
- There aren’t any threaded bungs welded into this exhaust kit. No Bungs! H&S exhaust kits are designed to work with H&S Tuners which do not require any sensors to be re-installed into the new exhaust system.
- This exhaust kit does NOT include a tip — however, an H&S universal tip kit is available when ordering above.
- This high performance exhaust is intended solely for closed-course racing use and is not street legal in ANY state. This exhaust system cannot be used on any vehicles registered or certified for highway use. Please check your local, state, & federal laws before purchasing. This exhaust system
661is not legal for sale or use in the state of California.
H&S FloPro 5" Cat-Back DPF-Delete without Muffler Kit 661 fits:
- Fits All 2011 – 2012 LML Duramax

Links
- Manufacturer Product Web Page
- Product Installation Manual: Coming Soon!
- DEF/UREA Tank Removal Instructions
- Manufacturer F.A.Q
- Manufacturer Product Support
- H&S Performance Warranty
Manufacturer Contact Info:
888-628-1730
h4. 435-628-1730
H&S Performance, LLC
4012 S. River Road
St. George, UT 84790








