Hummer H3 Exhaust Installation Guide

Remove Factory Exhaust

Your Billy Boat exhaust system was designed to be a direct replacement exhaust system, while offering the best performance, finish and value available from a stainless steel exhaust system. Proper installation will ensure a lifetime of quality and performance from this product.

Disconnect the NEG (-) battery terminal. Disconnecting power from your vehicle may allow the computer to “clear” its memory during installation. Loosen and remove nuts from existing flange.Remove stock system from rubber hangers keeping in mind that it may be necessary to cut the stock system just behind the center resonator for easy removal.

Install your new H3 Muffler

Install center pipe and axle hoop in stock rubber hangers, then install muffler in stock rubber hangers and algin holes in flange’s with gasket. Installed supplied bolts and nuts thru flanges. Do not tighten anything up until the entire system is in place. Once system is in place, start tightening the bolts at the front making sure the flange is pulled up evenly and it is sealed around the ball and work your way back. Tighten the flange’s evenly. Make sure the muffler is aligned before tighting the clamp.

It is normal for stainless steel to discolor slightly. To ensure a quality, lasting finish, thoroughly wipe down the entire system before starting. Reconnect the battery NEG (-) terminal. Start vehicle. With the vehicle running at an idle, check for exhaust leaks at each connection. If there is a leak check that the mounting hardware is tight.