[Fierysun]

Originally Posted by user1029

KillerB 4-1 header absolutely destroys tomei/hks type of 4-2-1 headers. It’s 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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