Bill Smith
Founder, 1929-2014
Speedy Bill
Since 1952
Speedway Motors Logo
America's Oldest Speed Shop ®


Flowmaster 15935 2-1/4 Inch U-Fit Dual Exhaust Kit

SAME DAY SHIPPING! Order within the next 5 hours 41 minutes and receive same day shipping

Material Type:
Sold in Quantity:
Tube O.D.:
Hardware Included:
Wall Thickness:
Mandrel Bent:
MFG. Part #:
Garage Sale:
16 piece kit doesn't include any mufflers or hardware.
Flowmaster 15935 2-1/4 Inch U-Fit Dual Exhaust Kit

Click image to enlarge



Q & A

What's in the Box

These 16-gauge mandrel bent kits are for you guys who are doing your own thing and building your own dual exhaust. Includes front adaptor pipes, intermediate pipes, H-pipe assembly, over the axle pipes and a couple different tailpipes. Each piece is aluminized and has a slip-fit connection.

Kit includes:
  • Front adapter pipes
  • Intermediate pipes
  • H-pipe assembly
  • Over-the-axle pipes
  • Your choice of optional tailpipe exits
  • Slip-fit connections for easy assembly
  • Mandrel bent, 16-gauge aluminized steel tubing
  • Does not come with any hardware
  • At the connection points, one end is expanded for assembly purposes

U-Fit Dual Exhaust Installation Instructions (PDF)


You may also be interested in:

Stainless Steel Exhaust/Muffler Tube Clamps
(Part #91013001)

These superior quality muffler tube clamps/u-bolts are 100% stainless steel. They are ideal for any exhaust system and feature a saddle-type clamp for added strength. Choose plain or polished. Choose from 1-1/2", 1-5/8", 1-3/4", 1-7/8", 2", 2-1/8", 2-1/4", and 2-1/2" sizes available. Thread size on tube clamps is 8mm-1.25.

  • Stainless steel
  • Ideal for any exhaust system 
  • Saddle-type clamp for added strength
  • Thread size on clamps is 8mm-1.25
  • Choose plain or polished
  • Choose from 1-1/2", 1-5/8", 1-3/4", 1-7/8", 2", 2-1/8", 2-1/4", and 2-1/2" pipe diameter
Flowmaster 42441 2-1/4 Inch Muffler, Offset Inlet/Centered Outlet
(Part #37842441)

The American Thunder 40 Series is the most aggressive sounding street and strip muffler in Flowmaster's product line. The 40 Series will generate extreme interior resonance within the vehicle. If you want to really hear your exhaust system inside as well as outside your vehicle the 40 Series is for you. 

The Flowmaster 40 Series two chamber muffler is the original bad boy for street/strip cars. Made of 16 gauge, aluminized steel, the unique design cancels out noise, but makes big power.

Overall measurement is 19" long, 9-3/4" wide and 4" thick. Body alone is 13" long. 

40 Series Muffler, 2.25" IN (O) / OUT (C): ea

Flowmaster Ball Flange - 3 Inch Collector to 2.25 Inch
(Part #37815924)
                        These neat, two bolt ball flange kits give you a leak free exhaust connection but allow for engine flex and misalignment. Several collector and exhaust sizes available. Sold per pair.  
Mild Steel Exhaust Bend Kit, 2-1/4 Inch
(Part #91013822)

Sometimes it's just easier to do it yourself than have someone else screw it up for you. These exhaust bend kits include enough tubing to allow you to run your own exhaust system the way you want it. Each pipe is expanded on one end to allow easy installation. Clamps sold separately.Tubing has a natural, uncoated finish. (Not Aluminized)

  • Four 48" Straight Pipes
  • Four 90 Degree Pipes
  • Four 45 Degree Pipes 
  • Four 180 Degree U-Bends