Description

Here at Mishimoto we've decided to expand our line of 2015 WRX parts. Mishimoto is proud to release the 2015+ Subaru WRX/STI cat-back exhaust. One of the biggest complaints 2015 WRX owners have is that the stock 2015 WRX exhaust systems lack an aggressive tone. By installing the Mishimoto 2015 WRX cat-back exhaust allows the entire system to breathe easier, providing horsepower, torque, and a rich exhaust tone.

After comparing many different muffler sizes and designs, Mishimoto engineers chose oval mufflers to help prevent highway drone but still provide an aggressive exhaust tone for your 2015 WRX. During dyno pulls with the 2015 CVT WRX, Mishimoto saw gains of up to 9 whp and 8 wtq using 93 octane fuel while maintaining safe AFRs on a stock tune (see additional images for dyno chart). This 2015 WRX exhaust installs in under one hour and features quad 3.5" staggered, double wall polished tips. The Mishimoto 2015 WRX cat-back exhaust provides an extremely aggressive turbo and exhaust tone under acceleration and boost, giving you that sweet tone you've been looking for!

The Mishimoto engineers designed this WRX and STI cat-back exhaust as a four-piece design, comprised of precision TIG-welded, 304 stainless steel. This allows a smooth exhaust flow from the 3.0" 2-bolt exhaust flange all the way through the 2.25" Y-section. To top it off, this 2015 WRX exhaust includes two 2.25" V-band clamps, a 3" exhaust-band clamp, a new 3" 2-bolt flange gasket, and all stainless steel hardware, so you don’t have to worry about rusty hardware!

For 2015 WRX or STI owners looking to get the most out of their WRX, this 2015 WRX cat-back exhaust mates perfectly with the Mishimoto Subaru WRX Performance Downpipe.

With the catted downpipe and Mishimoto Subaru WRX Tuning Kit, Mishimoto saw dyno proven gains of up to 57 whp and 52 wtq using 93 octane fuel on the 6-speed 2015 WRX (see additional images for dyno chart). Above all, this 2015 WRX downpipe provides a significant torque improvement in the low end and across the entire power band. The Mishimoto 2015 WRX downpipe provided an extremely aggressive turbo and exhaust tone under acceleration and boost, giving you that aggressive tone you have been looking for!

The engineers at Mishimoto designed the 2015 WRX downpipe as a one-piece design with precision TIG-welded 304 stainless steel. This allows uninterrupted exhaust flow from the 3.5" 4-bolt exhaust flange all the way through the 3.0" downpipe. The engineers also created two different transmission-specific brackets, for the 6-speed manual and CVT, to mount the downpipe to the transmission. To customize the 2015 WRX downpipe even further, it is offered in either a catted or catless version. Because the engineers know that 2015 WRX owners commonly like to add wideband O2 gauges, they included an additional O2 sensor bung and plug in an ideal location for aftermarket wideband sensors!

To top it off, the 2015 WRX downpipe includes new turbine housing studs and nuts (which commonly strip), a new turbo outlet gasket, a new 3” 2-bolt flange gasket, and all stainless steel hardware, so you don’t have to worry about rust on your hardware. Like all of our 2015 WRX parts, this WRX downpipe comes with the Mishimoto Lifetime Warranty you know and trust.

Specifications

Cat-Back:

  • Direct fit for the 2015+ Subaru WRX STI
  • Dyno-proven maximum gains of up to 9 whp and 8 wtq and peak gains of up to 4 whp and 3 wtq using 93 octane fuel while maintaining safe AFRs on the stock tune (2015 WRX w/ CVT)
  • Extremely aggressive turbo and exhaust tone under acceleration and boost
  • Mates with the Mishimoto, stock, or most aftermarket downpipes
  • Installs in under an hour
  • Designed with oval mufflers to prevent highway drone
  • Quad 3.5" staggered double wall, polished tips
  • Full 304 stainless steel mandrel-bent construction
  • 3" to 2.25" exhaust split helps maintain proper exhaust velocity
  • TIG-welded to perfection
  • Mishimoto Lifetime Warranty

Down-Pipe:

  • Direct fit for the 2015+ Subaru WRX and 2014+ Subaru Forester XT
  • Dyno-proven gains of up to 57 whp and 52 wtq with catted downpipe using 93 octane fuel on 6-speed WRX (tuning required)
  • Dyno-proven gains of up to 73 whp and 64 wtq with catted downpipe, and Mishimoto Subaru WRX Performance Air Intake, using 93 octane fuel on 6-speed WRX (tuning required)
  • Significant torque improvement in the low end and across the entire power band
  • Fits with both CVT and manual transmissions
  • Extremely aggressive turbo and exhaust tone under acceleration and boost
  • 304 stainless steel one-piece design allows for uninterrupted exhaust flow
  • 3/8" thick stainless steel, CNC-machined four-bolt flange
  • 3.5" to 3.0" transition out of turbo outlet allows exhaust gas to flow smoothly
  • Additional wideband oxygen-sensor bung and plug-in ideal location for aftermarket wideband sensors
  • Mates with the stock cat-back exhaust
  • New studs for turbine housing
  • Includes stock gasket for turbo outlet
  • Mishimoto Lifetime Warranty

What's Included

Cat-Back:

  • (1) Stainless Steel Mid-Pipe w/ 2-Bolt Flange
  • (1) Stainless Steel Mid-Pipe to Y-Section
  • (2) Stainless Steel Mufflers w/ Quad 3.5" Staggered Double Wall Tips, Polished
  • (2) 2.25" V-Band Clamps
  • (1) 3" Exhaust-Band Clamp
  • (1) 2-Bolt Flange Gasket
  • (2) 3/8"-16, 1-1/2" Hex Bolts, Stainless Steel
  • (2) 3/8"-16 Serrated Flange Hex Nuts, Stainless Steel
  • (2) M10 Washers, Stainless Steel
  • Mishimoto Lifetime Warranty

Down-Pipe:

  • (1) Stainless Steel Downpipe w/ 4-Bolt Turbo Flange and 2-Bolt Cat Flange
  • (1) Stainless Steel Transmission Bracket (Manual or CVT)
  • (1) High-flow Catalytic Converter (Optional)
  • (1) Additional M18 x 1.5 O2 Bung with Plug
  • (1) 4-Bolt Flange Gasket
  • (1) 2-Bolt Flange Gasket
  • (4) M10 x 1.25 Exhaust Studs
  • (2) M10 x 1.25 x 40mm Hex Bolts, Stainless Steel
  • (6) M10 x 1.25 Serrated Flange Nuts, Stainless Steel
  • (2) M10 x 1.25 x 16mm Hex Bolts (w/ 5mm Head Height), Stainless Steel
  • (4) M10 Washers, Stainless Steel
  • (2) M8 x 1.25 x 20mm Flange Bolts, Stainless Steel
  • (1) M6 x 1.0 x 10mm Flange Bolt, Stainless Steel
  • Mishimoto Lifetime Warranty

Compatibility

  • 2015+ Subaru WRX

Here at Mishimoto we've decided to expand our line of 2015 WRX parts. Mishimoto is proud to release the 2015+ Subaru WRX/STI cat-back exhaust. One of the biggest complaints 2015 WRX owners have is that the stock 2015 WRX exhaust systems lack an aggressive tone. By installing the Mishimoto 2015 WRX cat-back exhaust allows the entire system to breathe easier, providing horsepower, torque, and a rich exhaust tone.

After comparing many different muffler sizes and designs, Mishimoto engineers chose oval mufflers to help prevent highway drone but still provide an aggressive exhaust tone for your 2015 WRX. During dyno pulls with the 2015 CVT WRX, Mishimoto saw gains of up to 9 whp and 8 wtq using 93 octane fuel while maintaining safe AFRs on a stock tune (see additional images for dyno chart). This 2015 WRX exhaust installs in under one hour and features quad 3.5" staggered, double wall polished tips. The Mishimoto 2015 WRX cat-back exhaust provides an extremely aggressive turbo and exhaust tone under acceleration and boost, giving you that sweet tone you've been looking for!

The Mishimoto engineers designed this WRX and STI cat-back exhaust as a four-piece design, comprised of precision TIG-welded, 304 stainless steel. This allows a smooth exhaust flow from the 3.0" 2-bolt exhaust flange all the way through the 2.25" Y-section. To top it off, this 2015 WRX exhaust includes two 2.25" V-band clamps, a 3" exhaust-band clamp, a new 3" 2-bolt flange gasket, and all stainless steel hardware, so you don’t have to worry about rusty hardware!

For 2015 WRX or STI owners looking to get the most out of their WRX, this 2015 WRX cat-back exhaust mates perfectly with the Mishimoto Subaru WRX Performance Downpipe.

With the catted downpipe and Mishimoto Subaru WRX Tuning Kit, Mishimoto saw dyno proven gains of up to 57 whp and 52 wtq using 93 octane fuel on the 6-speed 2015 WRX (see additional images for dyno chart). Above all, this 2015 WRX downpipe provides a significant torque improvement in the low end and across the entire power band. The Mishimoto 2015 WRX downpipe provided an extremely aggressive turbo and exhaust tone under acceleration and boost, giving you that aggressive tone you have been looking for!

The engineers at Mishimoto designed the 2015 WRX downpipe as a one-piece design with precision TIG-welded 304 stainless steel. This allows uninterrupted exhaust flow from the 3.5" 4-bolt exhaust flange all the way through the 3.0" downpipe. The engineers also created two different transmission-specific brackets, for the 6-speed manual and CVT, to mount the downpipe to the transmission. To customize the 2015 WRX downpipe even further, it is offered in either a catted or catless version. Because the engineers know that 2015 WRX owners commonly like to add wideband O2 gauges, they included an additional O2 sensor bung and plug in an ideal location for aftermarket wideband sensors!

To top it off, the 2015 WRX downpipe includes new turbine housing studs and nuts (which commonly strip), a new turbo outlet gasket, a new 3” 2-bolt flange gasket, and all stainless steel hardware, so you don’t have to worry about rust on your hardware. Like all of our 2015 WRX parts, this WRX downpipe comes with the Mishimoto Lifetime Warranty you know and trust.

Cat-Back:

  • Direct fit for the 2015+ Subaru WRX STI
  • Dyno-proven maximum gains of up to 9 whp and 8 wtq and peak gains of up to 4 whp and 3 wtq using 93 octane fuel while maintaining safe AFRs on the stock tune (2015 WRX w/ CVT)
  • Extremely aggressive turbo and exhaust tone under acceleration and boost
  • Mates with the Mishimoto, stock, or most aftermarket downpipes
  • Installs in under an hour
  • Designed with oval mufflers to prevent highway drone
  • Quad 3.5" staggered double wall, polished tips
  • Full 304 stainless steel mandrel-bent construction
  • 3" to 2.25" exhaust split helps maintain proper exhaust velocity
  • TIG-welded to perfection
  • Mishimoto Lifetime Warranty

Down-Pipe:

  • Direct fit for the 2015+ Subaru WRX and 2014+ Subaru Forester XT
  • Dyno-proven gains of up to 57 whp and 52 wtq with catted downpipe using 93 octane fuel on 6-speed WRX (tuning required)
  • Dyno-proven gains of up to 73 whp and 64 wtq with catted downpipe, and Mishimoto Subaru WRX Performance Air Intake, using 93 octane fuel on 6-speed WRX (tuning required)
  • Significant torque improvement in the low end and across the entire power band
  • Fits with both CVT and manual transmissions
  • Extremely aggressive turbo and exhaust tone under acceleration and boost
  • 304 stainless steel one-piece design allows for uninterrupted exhaust flow
  • 3/8" thick stainless steel, CNC-machined four-bolt flange
  • 3.5" to 3.0" transition out of turbo outlet allows exhaust gas to flow smoothly
  • Additional wideband oxygen-sensor bung and plug-in ideal location for aftermarket wideband sensors
  • Mates with the stock cat-back exhaust
  • New studs for turbine housing
  • Includes stock gasket for turbo outlet
  • Mishimoto Lifetime Warranty

Cat-Back:

  • (1) Stainless Steel Mid-Pipe w/ 2-Bolt Flange
  • (1) Stainless Steel Mid-Pipe to Y-Section
  • (2) Stainless Steel Mufflers w/ Quad 3.5" Staggered Double Wall Tips, Polished
  • (2) 2.25" V-Band Clamps
  • (1) 3" Exhaust-Band Clamp
  • (1) 2-Bolt Flange Gasket
  • (2) 3/8"-16, 1-1/2" Hex Bolts, Stainless Steel
  • (2) 3/8"-16 Serrated Flange Hex Nuts, Stainless Steel
  • (2) M10 Washers, Stainless Steel
  • Mishimoto Lifetime Warranty

Down-Pipe:

  • (1) Stainless Steel Downpipe w/ 4-Bolt Turbo Flange and 2-Bolt Cat Flange
  • (1) Stainless Steel Transmission Bracket (Manual or CVT)
  • (1) High-flow Catalytic Converter (Optional)
  • (1) Additional M18 x 1.5 O2 Bung with Plug
  • (1) 4-Bolt Flange Gasket
  • (1) 2-Bolt Flange Gasket
  • (4) M10 x 1.25 Exhaust Studs
  • (2) M10 x 1.25 x 40mm Hex Bolts, Stainless Steel
  • (6) M10 x 1.25 Serrated Flange Nuts, Stainless Steel
  • (2) M10 x 1.25 x 16mm Hex Bolts (w/ 5mm Head Height), Stainless Steel
  • (4) M10 Washers, Stainless Steel
  • (2) M8 x 1.25 x 20mm Flange Bolts, Stainless Steel
  • (1) M6 x 1.0 x 10mm Flange Bolt, Stainless Steel
  • Mishimoto Lifetime Warranty
  • 2015+ Subaru WRX

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