high performance product is intended SOLELY for closed-course
racing use and is not street legal in ANY state. This product
cannot be used on any vehicles registered or certified for highway
use. Please check your local, state, and federal laws before
racing exhaust kits are designed for maximum flow, with straight
piped sound! Our kits for the Duramax LMM will leave the competition
in the smoke!
which of our free flowing exhaust kits you choose, you can
be sure our mandrel-bent pipes flow better than anything out
there, and sound even better!
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.
are ready to take your Duramax LMM to new heights, go with
an off-road exhaust system from H&S Performance!
DPF delete kits will cause regen and a Check Engine Light
unless installed in conjunction with one of our tuners
Frequently Asked Questions on Duramax DPF Delete Kits go
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 stream.**
/ EGR Removed Warning!
PRODUCT MAY BE CAPABLE OF DISABLING ALL OR PART OF THE EMISSIONS
SYSTEM ON CERTAIN VEHICLE APPLICATIONS, WHEN SELECTED BY THE
END USER TO DO SO. EMISSIONS REMOVAL IS NOT LEGAL ANYWHERE WITHIN
THE USA, UNLESS THE VEHICLE IS NOT REGISTERED WITH THE DIVISION
OF MOTOR VEHICLES, AND IS BEING USED SOLELY AS A COMPETITION
RACE VEHICLE. BY SELECTING ANY SETTINGS THAT CAN ALLOW REMOVAL
OF EMISSIONS EQUIPEMNT, YOU ACCEPT ALL RISK AND LIABILITY ASSOCIATED
WITH ITS USE, AND AGREE TO THE FOLLOWING TERMS AND CONDITIONS.
settings or calibrations that may allow emissions removal are
intended and developed for off-highway, organized, sanctioned,
closed-course RACE/COMPETITION USE ONLY! Any other use, on ANY
road, public or private, within the USA, is STRICTLY PROHIBITED.
2.We insist that you do not select any calibrations or settings
if this vehicle has been registered or certified for highway
use within the USA.
3.This product when used incorrectly may violate local, state,
and federal laws pertaining to emissions, traffic, registration,
4.Use of this product may damage or destroy mechanical and/or
electrical components of this vehicle.
5.Use of this product may void or nullify the vehicles factory
6.User understands that motorsports are dangerous, and that
installation of this product may subsequently require special
driving skills or techniques to safely operate the vehicle.
7.User assumes sole responsibility for the safe, proper, and
legal use of the vehicle at all times.
8.The purchaser and end user releases, indemnifies, discharges,
and holds harmless Thoroughbred Diesel from
any and all claims, damages, causes of action, injuries, or
expenses resulting from or relating to the use or installation
of this product that is in violation of the terms and conditions
on this page, the product disclaimer, and/or the product installation
instructions. Thoroughbred Diesel will not
be liable for any direct, indirect, consequential, exemplary,
punitive, statutory, or incidental damages or fines cause by the use or installation of this product.