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Old 07-07-2017, 08:31 PM   #26 (permalink)
19bonestock88
Master EcoModder
 
Join Date: Jun 2016
Location: KY
Posts: 1,346

IGL - '04 Saturn Ion
Team Saturn
90 day: 56.19 mpg (US)
Thanks: 63
Thanked 364 Times in 268 Posts
Just an update; the car is still stock, driving around home returns mileage in the low-mid forties... Still deciding on what mods to do... The front O2 going bad, coupled with an exhaust rattle suggests maybe use the header from my Redline(install new upstream O2), make a cat less downpipe and see how much that helps... Every post about someone doing a header/downpipe that I've read indicates a modest gain...
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me and my metro (07-08-2017)