Two Brothers Racing Harley Davidson Sportster - Manual

1. Make sure the bike is completely cool before starting the installation
and secure on a service lift.
2. Unplug O2 sensor connectors from wiring harness. Note: Pay attention
to wire routing for reinstallation.
3. Loosen heat shield clamps and remove heat shields from both the
front and rear head pipes.
4. Remove exhaust header nuts located at cylinder head. Keep these
for use with TBR Comp-S system.
5. Remove rear head pipe clamp bolt. Reinstall bolt after clamp is
removed.
IMPORTANT - PLEASE READ CAREFULLY
Two Brothers Racing products are intended for closed course competition
purposes only.
We recommend that this performance part be installed by a qualified motorcycle
technician. If you have any doubts as to your ability to install this performance
part, please consult with your local motorcycle dealer. Read all instructions
first before starting installation. Make sure the motorcycle and exhaust system
are completely cool before starting the installation. Also, make sure the bike
is secure on a center stand or ideally a service lift during installation. Be sure
to save all stock components for possible use later.
Installation Instructions
Warranty Information
Two Brothers Racing products are intended for closed course competition purposes only, and therefore are
sold “as is” without warranty. Two Brothers Racing specifically disclaims any warranties of merchantability
or fitness for a particular purpose and disclaims all responsibility for consequential and incidental damages
or any other losses arising from the use of these products or parts. Not tested for use with OEM or aftermarket
accessories.
Harley Davidson
Sportster
Part # 005-3770199
6. Remove bolts that attache mufflers to mounting bracket. Then remove
bracket.
7. Remove OEM exhaust system.
8. Remove O2 sensors to install on TBR head pipes.
9. Using snapring pliers, carefully remove the circlips and flanges from
the stock exhaust system. Install the stock flanges to the new TBR head
pipes. Check the condition of the circlips, we recommend replacing
them with new ones if they are bent or twisted.