silverbullet5643

I just recently purchased a mac Off Road H with the Mil Eliminators for my 03 GT. Someone told me I needed O2extentions but with I got online to buy them they said that only the 04's needed them. Has anyone installed an off road H on their 03 GT and if so did u need the extentions or not??

Thanks a million,
Adam

silverbullet5643

Also with the Mil Eliminators in, what affect on my gas mileage will I be seeing? I get around 20-22 highway and city mixed now with just flowmasters.

silverbullet5643

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Jaybird79

You don't need the o2 extentions if you have an '03. The extentions are for the '04s.

And there will be NO effect on gas mileage with MIL eliminators. Basically they are plugged into the rear o2 sensors which only make sure the cat. converters are there and working. The whole reason of having MIL eliminators is to trick the rear o2 sensors into thinking the cats are still there.

momob009

will a 02 gt need a mil with off road h-pipes

Shawn02GT

yes! or you can turn off the two rear o2 sensors with a handheld tuner like the xcalII

96GT226410

They don't make the XCal2 anymore. XCal3 is the latest tuner from SCT.

silverbullet5643

Should I have any noticeable power gain? Also, will I have the loud deep muscle car sound with the Mac Off-Road H and Flowwmasters? Thanks for all the help guys!

silverbullet5643

bump

96GT226410

You'll gain about 3-6 at the wheels with a mid pipe and catback on a mostly stock car. A tune could yield up to 10-13 more.