Grimmspeed Equal Length Exhaust Manifold 2015-2021 WRX / 2014-2018 Forester XT

GrimmSpeed headers for the 2015–2021 WRX are engineered to maximize performance, durability, and fitment. Unlike OEM manifolds, which have flow restrictions from neckdowns, inefficient merge collectors, and suboptimal angles, our headers are designed for smooth, consistent exhaust flow to the turbo.

Design & Performance:

• True equal-length runners CNC bent and trimmed as a single piece, with less than 1% variance and maximum 5° difference in bends for consistent pulse timing.
• Cast merge collector with optimized inlet/outlet angles ensures smooth, low-restriction flow and eliminates opposing exhaust pulses.
• Thicker 304 stainless tubing and flanges for added durability, longevity, and gasket sealing.
• Welded flange design improves flow from head to runner.
• Fits between the stock skid plate and oil pan with no clearance issues.
• Includes J-pipe and turbo bracket for retained support.

Quick Specs:

• Full 304 Stainless Steel construction: flanges, tubing, collector, and badge
• True equal-length runners
• Cast merge collector for smooth, consistent flow
• Thick 1/2" CNC cut flanges & 14ga tubing for durability
• No tune required – bolt on and go
• Gaskets and hardware included
• Made and welded in the USA