Grimmspeed HiFlow Up-Pipe Ceramic-Coated – Subaru WRX/STI/FXT (EJ20/EJ25)

Grimmspeed HiFlow Up-Pipe Ceramic-Coated – Subaru WRX/STI/FXT (EJ20/EJ25)

Adding an aftermarket Up Pipe is one of the first things you should do to your Subaru. Arguably one of the best $/HP ratios. Our goal was to make a premium heavy duty Up Pipe for our customers!

The entire Up-Pipe is made of 304 SS(flanges, flex, tubing) and has a pipe-wall thickness of 14 Gauge, this is the most “heavy-duty” pipe you will find. Many other pipes use cheap thin steel and are marketed as “super light weight”, not us. The inlet size is 1.92″ and the pipe tapers down to 1.72” which acts as a funnel as it moves into the turbo allowing for the smoothest transition and best air-flow quality. The one of a kind Triple Layer Flex Joint is not located in the bend, which adds to the life expectancy of the flex section. Our outlet size is a perfect match to the most common stock location turbos allowing for a smooth transition into the turbo.

Since we are a porting company we make sure to have the smoothest transitions between pipes to allow for maximum flow and quickest spoolup(we call this “quality airflow”).

Flow Bench Results vs. OEM
OEM Catless – 244.6 CFM
OEM Catted – 164.7 CFM
GrimmSpeed – 292.6 CFM