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Whats been some of your experiences with mpg after putting on a magnaflow exhaust? I want to put a magnaflow # 11225 on my sx koup but i want to find out about how many miles a gallon i can get with this exhaust on, before i actually put it on.
 

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it probably wont make much of a difference if you dont change your driving, but you may lose a few because you will be a little heavier on the gas just to hear it
 

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Whats been some of your experiences with mpg after putting on a magnaflow exhaust? I want to put a magnaflow # 11225 on my sx koup but i want to find out about how many miles a gallon i can get with this exhaust on, before i actually put it on.
A couple of months back, I installed a Magnaflow muffler #11225 on my koup sx... I noticed a gain of 3-4 mpg on the highway!! My highest gas mileage on the highway has reached 39.4! I double checked the car's calculation with my manual calculation and they matched....:):)
 

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haha i was at about 32 best on highway, then put my magnaflow on. and now i can get above 26 for some reason... koup sx 6 spd
 

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ya my gas mileage b4 my muffler from magnaflow was about 32 mpg and now im getting like 25-28. mostly because im running a tad harder too lol
 

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Can Someone please post some vids of a koup with 11225?
 

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Discussion Starter · #8 ·
thanks for all your replies guys. i was also wondering if clamping the muffler was easier or better than welding it. my koup is a lease so would it be easier to put the stock exhaust back on after the lease up with a clamped magnaflow instead?
 

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either way, you're cutting your stock one off and then you'll have to re-weld your stock one back on so i dont see any difference
 

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I'm getting close to 29 doing city driving with the Magnaflow muffler w/ tips and TK CAI. I don't do very much highway driving, so I'm no help there.
 
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