How to Measure Head-Pipe Diameter

WHY MEASURE?
By knowing the outside diameter size of your head-pipe, you can select the correct size muffler inlet / adapter, and ensure a correct and easy muffler installation. Please see guide.

How to Measure Head-Pipe Diameter

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WILL A TAILGUNNER™ FIT MY BIKE?

Tailgunner® GUNSHIP models are an easy, direct-fit, installation for all Harley- Davidson touring bikes (baggers.} Everything is included for you to perform a quick, effortless installation and easy to follow directions are included. We also offer custom, universal fit models for everything else. Just determine if there is 4″ diameter of clearance where the mufflers will mount on the bike and what the outside diameter size the exhaust pipe is where the muffler slips on. All universal models include a support bracket on the backside of each model. Tailgunner® universal fit models are a simple installation on many bikes. With others a certain amount of modification, such is required. This is an expected and enjoyable part of custom motorcycle building. Tailgunners® are mounted on everything from stock Harley-Davidsons, metric cruisers, sport bikes and autos and trucks and will slip-fit onto most after-market exhaust systems as well.

ARE THE BAFFLES REMOVABLE?

Tailgunner offers a baffle installation and removal service so you can be assured you get just the sound you want. Some disassembly of your muffler is required to remove or install a baffle. To retain the one-year mechanical warranty we invite you to allow us to provide this service for you. The service cost is $50.00 plus shipping. Turnaround time is typically only 1-2 days. Please call to schedule your service.

WHAT IS THE INLET SIZE OF THE UNIVERSAL MODELS?

The universal Tailgunners® will slip fit onto any exhaust pipe from 1.5″ through 3.” The direct application models are designed to mate with their respective motorcycle models.

HOW FAST DO THE BARRELS SPIN?

Barrel speed is determined by how much and how fast the exhaust gasses are passing through the turbine system. This “flow” is established by engine displacement and exhaust configuration. A 2 into 1 system moves more air than a 2 into 2 system. The barrels spin quite easily and are designed not to “over- speed.” The barrel assembly is powered by an internal stainless steel turbine system.

WILL THE BEARINGS LAST IN THE HOT, CARBON ENVIRONMENT?

Tailgunner® exhaust uses the highest quality American shielded radial bearings in each model. They are designed to resist heat and corrosion. To ensure smooth, even rotation of your rotary cannon exhaust barrel assemblies it is occasionally necessary to lubricate the bearings using WD-40.

CAN YOU RUN BOTH PIPES OF A BIKE THROUGH ONE TAIL GUNNER EXHAUST?

Yes. A two into one is an easy installation and provides the best performance gains.

HOW MUCH RESTRICTION DO I GET WITH A TAILGUNNER®?

Tailgunners® were designed to allow your exhaust to flow as efficiently as possible. They are an extremely free flowing slip on.

WHAT KIND OF PERFORMANCE INCREASE CAN I EXPECT?

When properly tuned you will enjoy a moderate increase in both horsepower and torque. Generally in the neighborhood of 4 to 5 lbs of torque and horsepower.

HOW MUCH BACK-PRESSURE?

Tailgunner® slip-ons are designed to be as non-restrictive (free flowing) as possible while giving you a deep, throaty sound. The most noticeable changes with a Tailgunner® are the improved sound, aggressive styling, weight reduction and a extra horse power and torque.

WHAT DO THEY SOUND LIKE?

A deep, low, throaty, big bike sound is the best description. These models come stock with straight through, fiberglass packed baffles and have a 2.5″ core. They are also available un-baffled. The universal models are loud, deep and throaty. Please listen to the universal audio file or video on the website.

WHAT ARE THEY MADE OF?

Our housings are made of either 16-gauge steel or stainless steel depending on the model. All units are chromed to perfection or highly polished if stainless steel. The barrel assembly and turbines are a combination of stainless steel and brushed aluminum. All hardware is stainless steel. Every Tailgunner® is made in America. Beware of cheap foreign imitations.

WHERE ARE TAILGUNNERS® MADE?

Tailgunner® Exhaust manufactures and assembles all of its products in the United States. We believe this is the best way to ensure our products quality.

HOW DO I MEASURE THE OUTSIDE DIAMETER OF MY EXHAUST / HEADER PIPE?

Universal 4″ and 5″ Tailgunners are a slip fit installation. This means the pipe slips on OVER your existing exhaust / head pipe. For an accurate measurement remove the current muffler and any heat shields so the end of the exhaust pipe is exposed. Simply measure the pipe opening from outside top to outside bottom or left to right. Remember, you are measuring the outside diameter as Tailgunner models slip over the existing exhaust pipe. Please see the “universal adapter instructions.”

DOES TAILGUNNER® OFFER A WARRANTY?

Yes. All Tailgunner® exhaust units come with a full one year MECHANICAL warranty. This warranty covers and is limited to the repair or replacement of any unit due to manufacturing defects at the manufacturers discretion. We do not warranty chrome products against discoloration. Even the best chrome in the industry may discolor if made hot enough. Please ensure your bike is tuned correctly.

HOW CAN I ORDER?

Directly from Tailgunner® by telephone, 774-563-8296. On our website (Shop Online.) Or you can request to purchase through your dealer.