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Old 07-28-2021, 07:42 PM   #150
Fierysun
Scooby Guru
 
Member#: 82745
Join Date: Mar 2005
Chapter/Region: SCIC
Location: So Cal
Vehicle:
2005 Subaru STI
2003 EJ207 S204 Wagon

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Quote:
Originally Posted by user1029 View Post
KillerB 4-1 header absolutely destroys tomei/hks type of 4-2-1 headers. Itís not even close

https://www.iwsti.com/threads/killer...esults.322182/
The Tomei 4-2-1 headers are designed for a different power band. Probably better around 550whp and lower. Much like the Cosworth and Subaru OEM NA intake, they are great at much higher power levels, but not so much at lower levels.
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