2015-2021 WRX Headers

Headers replace the factory exhaust manifold on your 2015-2021 WRX and are one of the defining modifications for how the car sounds and where it makes power. The fundamental choice is equal length versus unequal length, and it changes the character of the car more than any other bolt-on.

Unequal-length headers preserve the classic Subaru boxer rumble — that uneven burble is literally the sound of unequal-length runners. Equal-length headers trade the rumble for a smoother, more exotic tone and measurably better flow, which shows up as power gains across the midrange and top end. Neither is objectively better; it is a choice between sound character and performance.

Fitment details to check: confirm the header matches your oil pan (some designs require a specific aftermarket pan), verify ground clearance if your WRX is lowered, and check whether the kit includes new gaskets and hardware. Ceramic coating or heat wrap is worth considering — it keeps underhood temperatures down and protects nearby components.

Like a downpipe, headers require a tune to realize their gains safely. Every header here is confirmed for the 2015-2021 WRX chassis — filter by equal or unequal length to match the sound and power delivery you want.