Thread: Going from HKS Hi Power to GTM 3", what to expect?
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Old 08-28-2011, 08:40 PM   #1 (permalink)
Footloose301
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Default Going from HKS Hi Power to GTM 3", what to expect?
Quick question:

I'm prepping for my stage 2 GTM TT kit that I'll be ordering in the coming months and thinking I should ditch the HKS for a 3" GTM exhaust.

I just got tuned two weeks ago, would it require a retune and how much power do you suppose I would lose?
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