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• Direct fit for the 2015+ Subaru WRX
• Dyno-proven gains of up to 73 whp and 64 wtq with catted downpipe, Mishimoto tune and Mishimoto Performance Air Intake using 93 octane fuel (see additional images for dyno chart)
• Dyno proven gains of up to 57 whp and 52 wtq with catted downpipe and Mishimoto tune using 93 octane fuel (see additional images for dyno chart)
• Significant torque improvement in the low end and across the entire power band
• Fits with both manual and CVT transmissions
• Extremely aggressive turbo and exhaust tone under acceleration and boost
• 304 Stainless Steel 1-piece design allows for uninterrupted exhaust flow
• 3/8″ thick stainless steel CNC-machined 4-bolt flange
• 3.5″ to 3.0″ transition out of turbo outlet allows exhaust gas to flow smoothly
• Additional wideband O2 sensor bung and plug in ideal location for aftermarket wideband sensors
• Mates with the stock cat-back exhaust
• New turbine housing studs
• High flow catalytic converter (optional)
• Includes stock Subaru turbo outlet gasket
• Made in the USA
• Mishimoto Lifetime Warranty
Model: MMDP-WRX-15
2015 Subaru WRX/STI Down Pipe Installation Guide
PARTS LIST
(1) STAINLESS STEEL DOWNPIPE WITH 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 1.5MM O2 SENSOR BUNG WITH PLUG OPTIONAL AIRBOX WITH PROTECTIVE EDGING
(1) 4-BOLT FLANGE GASKET
(1) 2-BOLT FLANGE GASKET
(4) M10 X 1.25MM EXHAUST STUDS
(2) M10 X 1.25MM X 40MM HEX BOLTS, STAINLESS STEEL
(6) M10 X 1.25MM SERRATED FLANGE NUTS, STAINLESS STEEL
(2) M10 X 1.25MM X 16MM HEX BOLTS (WITH 5MM HEAD HEIGHT), STAINLESS STEEL
(4) M10 WASHERS, STAINLESS STEEL
(2) M8 X 1.25MM X 20MM FLANGE BOLTS, STAINLESS STEEL
(1) M6 X 1.0MM X 10MM FLANGE BOLT, STAINLESS STEEL
TOOLS NEEDED
12MM DEEP SOCKET
13MM DEEP SOCKET
14MM SOCKET
14MM DEEP SOCKET
15MM DEEP SOCKET
E10 TORX SOCKET
3/8” DRIVE 6” EXTENSION
3/8” DRIVE SWIVEL SOCKET
3/8” DRIVE RATCHET
14MM RATCHET WRENCH
14MM WRENCH
22MM WRENCH
POP-CLIP PLIERS
FLATHEAD SCREWDRIVER
Install Time: 2 Hours
Difficulty: 3/5
Disclaimer
• Please dispose of any liquids properly.
• Allow vehicle to cool completely prior to attempting installation.
• Mishimoto Performance (MP) is not responsible for any vehicle
damage or personal injury due to installation errors, misuse,
or removal of MP products.
• MP always suggests that a trained professional install all
MP products.
• Do not run the engine or drive the vehicle while overheating.
Serious damage may occur.
• Raise vehicle only on jack stands or on a vehicle lift
Download the full install guide for MMDP-WRX-15 to learn how to install your new 2015 Subaru WRX/STI Down Pipe.
Download here: https://lib.store.yahoo.net/lib/yhst-6…
This has probably been done before, but it was my first idea on fixing this problem. Pipe wrenches grab hold of round pipes, so why not a rounded bolt? You never know what you will find when you start working on a used vehicle. Lucky for me, I have a new plug that will fit.