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This is the XForce cat-back exhaust system for the Subaru WRX. It replaces the exhaust from the catalytic converter back, running 3" mandrel-bent piping into a centre hotdog resonator and an oval rear muffler, exiting through a single 4" tip. Construction is raw 409 stainless steel and the system is a bolt-on fit. It fits manual vehicles only, and on some models the XForce E4-SW05-C1 connecting pipe is also needed to bolt up where the car has a stand-alone catalytic converter.
Mandrel bending keeps the full 3" bore through each curve instead of pinching it at the bends, so the stated diameter is what the gas actually sees along the whole run. Silencing is split across two stages: the centre hotdog takes an early pass at the sharper mid-range frequencies and leaves the oval rear muffler less to absorb, which is much of why the note lands as a deep rumble rather than a harsh one, and the oval section packages flat under the rear of the car while keeping useful internal volume. 409 is the ferritic stainless grade normally used for exhaust work because it tolerates repeated heat cycling and resists corrosion, and here it is left raw rather than polished, which suits sections that sit out of sight. It suits a manual WRX owner who wants a louder, deeper street exhaust without altering anything ahead of the converter.
Features
- 3" mandrel-bent cat-back system
- Raw 409 stainless steel construction
- Centre hotdog resonator plus oval rear muffler
- Single 4" tip
- Bolt-on fitment
- Deep, aggressive exhaust note
Fitment
Subaru WRX, manual transmission only. On some models the XForce E4-SW05-C1 connecting pipe must be ordered as well for a bolt-on fit where the car has a stand-alone catalytic converter. If you are not sure whether your car is covered, message us with your year, trim and engine and we will confirm the fit before you order.
Does not fit: Will not fit automatic-transmission cars - this system is for manual vehicles only.