My GT6 project car is almost ready to have an exhaust system installed. I am
planning to take it to a local muffler shop and have a custom system made for
it. It has a 6 into 1 tubular header with a 2 1/2" collector. I had thought
about having a 2 1/2" system made, but the GT6 Competition Prep manual
recommends a 2" system and points out that splitting the pipes at the rear
actually results in HP loss. My other GT6 has a 2" system with a single turbo
muffler in the rear. It's almost 14 years old and still makes just the right
amount of noise so I plan to put a similar system in the other car. Should I
have a 2 1/2" system made or stick to Kastner's recommendations and use a 2"
system?
thanks,
Dave
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