Thread: Question about long tubes on a 98 ls1.
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Old 07-24-2011, 01:55 AM   #8
8cd03gro


 
Drives: 2005 STi corn fed
Join Date: Jul 2008
Location: Colorado
Posts: 2,997
25-30hp is what I've seen with LTs + tune. LTs are definitely the best bolt on mod for the ls1.
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