Straightflow Muffler D-64 1in2out 5×8 18inch

Description

The Straightflow 64 1×2-18 Muffler is a straight-through exhaust muffler with a 64mm (2.5 inch) inlet and two outlets, a 5×8 inch oval body and an 18 inch length, made from 409 stainless steel. Straightflow lists it for custom performance exhaust builds and upgraded OEM systems.

Straightflow 64 1×2-18 Muffler Details

• Type: straight-through exhaust muffler
• Layout: 1 in / 2 out (Straightflow spec)
• Inlet diameter: 64mm (Straightflow spec)
• Outlets: 2 (Straightflow spec)
• Body: 5×8 inch oval (Straightflow spec)
• Length: 18 inch (Straightflow spec)
• Material: 409 stainless steel (Straightflow spec)
• Installation: welding required (Straightflow spec)
• Supplier code: SFT-17006 (Straightflow 12265)
• Make: Straightflow
• Fitment: universal

What Straightflow states

Straightflow says the 18 inch length gives a deeper, more refined exhaust tone than shorter mufflers, with less drone. The 1in2out layout lets a single exhaust line split into two outlets for dual-exit setups. The straight-through perforated core keeps backpressure low and supports exhaust flow.

Straightflow says the 409 stainless steel gives resistance to heat, moisture and corrosion, and the muffler is fully welded. It lists it for 64mm (2.5 inch) exhaust systems, performance street vehicles and custom exhaust fabrication, and recommends professional welding installation.

Fitment

This is a universal part, so there is no car list. Check your pipe diameter before ordering the Straightflow 64 1×2-18 Muffler.

This muffler is welded into the exhaust, so plan the job with your installer. If you are asking us about the Straightflow 64 1×2-18 Muffler, quote the supplier code so we can match the exact item.

Related Straightflow parts

See also: Straightflow Muffler D-64 1in2out 5×8 14inch, Straightflow Muffler D-76 1in2out 5x 8 18inch, Straightflow Muffler D-76 1in2out 5x 8 14inch.

Confirm exact vehicles on the Fitments tab before ordering.