GrimmSpeed's attention to detail during development and overall exhaust knowledge allow them to make the best possible upgraded version of the factory alternative. After isolating the inadequacies of the OEM exhaust manifold, They were able to create a replacement that’s leagues above.

The result of their hard work is one of the best looking, performing and most-durable header options in the Subaru aftermarket. The runners are CNC-bent and trimmed as a single piece with no additional welds to introduce points of failure or junctions that would interrupt flow, resulting in a truly equal-length header with almost no variance in runner bend angle. This is especially important for maximizing the performance of the 2022+ FA24 WRX twin scroll configuration. Their unique low restriction 304 Stainless Steel Cast Collector allows for the perfect runner spacing and angles necessary to obtain the equal bends and lengths of all the tubes. This is a major part of the GrimmSpeed Header’s ability to fit between the stock skid plate and the oil pan, while still providing the ideal performance from the rest of the design. The collector allows for more smooth and consistent flow compared to a welded variant which can have the flow interruption or structural failure that we see with other headers.

Fits all 2022+ Subaru WRX.