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Billy Boat Performance Mufflers - Touring Sound

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Billy Boat Performance Mufflers - Touring Sound

PART#: BB335E90T

BRAND: Billy Boat Performance

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$1,304.95 / each

Typically ships in 2-3 weeks

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Reduced backpressure gives your BMW an instant horsepower boost! The stock BMW muffler has a vacuum-activated butterfly valve on the driver's side muffler. This valve is closed under most conditions, diverting all exhaust gases to the passenger's side tailpipe. Under certain conditions (e.g. high throttle/low vacuum), the butterfly valve opens so two mufflers can be used. The Touring version of our Tri Flo exhaust duplicates the actuator and butterfly valve, so it operates in the same way as the stock exhaust. However, the muli-chambered design of our Tri Flo allows exhaust gasses to flow more freely. The result is a slight increase in horsepower and a more resonant sound when the butterfly valve is closed, but a bigger boost in power and a throaty growl when you hit the throttle hard. (For an even more aggressive sound, consider the Sport version of this exhaust which eliminates the actuator and valve.) Stainless steel construction. Limited lifetime warranty. Simple Cut/Clamp installation. Includes left and right mufflers.

Check out the sound clip on Youtube

Brand Description

Since 1989, Billy Boat Performance Exhaust systems have incorporated 3-generations of fabrication skill and racing talent inherited from the Boat Family. B&B starts with T-304 stainless steel known throughout the industry as the highest quality material practical for automotive exhaust applications. All exhaust tubing is mandrel bent on sophisticated CNC machinery for precise fit and uninterrupted exhaust flow. What's more, the use of T-304 stainless steel flanges offers precision fit and complete resistance to harsh elements. All hangers, resonators and tips are T-304 stainless steel as well. Every muffler is built in-house with years of racing and street development invested into its design. Each muffler is tuned to match its application for the best possible performance gain and sound quality combination. Stress relieved end plates, gussets and TIG welding ensures awesome strength and rugged durability.


Billy Boat Performance Exhaust offers a Limited Lifetime Warranty to the original purchaser of all non-race application products. Said products are warranted for life against corrosion and two years against any defect in workmanship and materials.

Claimed defective products must be returned with a Returned Goods Authorization number to Billy Boat Performance Exhaust at the buyer's expense. Products returned without an RGA number are subject to refusal. Upon receipt Billy Boat Performance Exhaust will, at its option, repair or replace the defective item. Damages caused by abuse, racing or alteration are not covered under warranty.

Our products are meant for high performance use and may not be legal for highway use in some states. Sound quality is subjective and may not be covered under warranty. The warranty set above is the only warranty, expressed or implied. In no event will Billy Boat Performance Exhaust be responsible for any consequential or incidental damages or charges.

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