We couldn't find any results
- Use different keywords
- Double check your spelling
- Start with something less specific - you can refine your search results later
- Try changing some of your filters below:
aFe Twist Steel Down-Pipe (Street)
- 2015-2018 STI
Ships for free in the 48 states
aFe Twist Steel Down-Pipe
Lurking under your hood is a pony-producing beast chained down by restrictive stock equipment. It's your ride, and you deserve every bit of power it can pump out. Set your motor free and experience the high-speed difference of an aFe Twisted Steel Down-Pipe.
Twisted Steel down pipes by aFe Power deliver big boosts in torque and horsepower with just an afternoon of bolting on these killer replacements for your factory down pipe. Started in 1999, aFe Power is known for its innovative design and manufacturing standards with regard to filters and cold air intakes for most road-going vehicles.
- Increases velocity and flow by decreasing back-pressure
- Direct replacement for factory down pipe
- Facilitates big boosts in torque and horsepower
- Built with mandrel-bent stainless or aluminized steel for superior durability
- Super thick flanges ensure no leaks
- Made in America
- Simply bolt right on – no mods required
aFe power introduces an all new Twisted Steel "Street" Down-Pipe for the Subaru WRX STI 2015-2017 with H4-2.5L engine. This down-pipe is designed using a 400 CPSI catalytic converter and mandrel-bent, 304 stainless steel tubing for optimum flow resulting in added horsepower and torque.
The down-pipe is 100% hand TIG-welded and uses a 2-1/2" into 3" stepped design that increases exhaust velocity and eliminates low pressure drops which helps to scavenge the exhaust for increased power. In house testing produced a max gain of +22 horsepower and +37 ft. lbs. of torque verified by our in house dyno. This kit includes a second bung for either a wide-band O₂ gauge or auxiliary instrumentation.
This system utilizes a 400 CPSI (cell per square inch) catalytic converter for maximum flow.
2-1/2" to 3" Stepped Design
A unique 2.5" to 3" stepped design, is used to increase exhaust velocity and increase usable torque. This means more aggressive throttle response and increased passing power.
100% TIG-Welded by certified craftsmen for race proven strength and durability. TIG-Welding provides the strongest welds reducing stress cracks.
Brushed 304 SS Construction
This down-pipe is constructed of durable mandrel bent brushed 304 stainless steel tubing for maximum performance, corrosion resistance and strength eliminating cracking.
All hardware and brackets are included for a hassle-free installation. This unit also comes with a 2-year warranty.
This down-pipe uses factory mounting locations for the O₂ sensor and includes an additional bung for either a wide-band O₂ gauge or auxiliary instrumentation.
aFe down-pipes are engineered and manufactured in our Corona, California manufacturing facility.
|Additional Warranty Information||None|
This Part Fits
0 customer reviews
Upload images for this product
Feel free to share pictures of your vehicle with this product!