Hi, I would like to introduce our company, Tech Works Engineering. We have been developing and designing Subaru parts from scratch since 1999. I personally have an extensive background in Superbike racing, both as a pro racer and an engine developer/tuner. It's good to see we have a quite a few bike enthusiast on this forum.
We are responsible for the manufacture of Sivertop's exhaust sytem. Although are niche is the Normally Aspirated engines, we have been building turbo Subaru engines and exhaust systems for a long long time. We pride ourselves on building true equal length headers with properly designed merge collectors. There are very few current exhaust sytems that fall in this category. If you are within an inch difference on your primary tube, I'll throw you a bone and call it equal length, but I have yet to see any production headers sold that even come much under 3 inches!
I have a few header pics here The ceramic coated one is the same as Silvertop's. The 4-2-1 header is for the WRX/STi:
4-1-header full system small(2).jpg4-2-1_HO_Header 002 small.jpg2.5i_4-1 Ceramic coated small.jpgSTi header ver2 009small.jpg
Tom Penner
Tech Works Engineering Inc.
[email protected]
PH 403-219-0085