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2.5 in. on my K8. Its really your personal preference.

If you do not have to gat your car inspected, get rid of the converter, but make sure you have a resonator or exhaust will sound terrible after shifts.

Anyone have any recommendations on adding a front strut bar on my lowered mx3? Can you really tell a difference, or is it a waste of money?

Any info on how to clean? Can I use one off of the 2.5L V6?

Can I change the EGR sensor with a bad EGR valve?

O ok. I have a bad EGR valve anyways. Thanks!

Flowmaster has the deep sound, not like most of the weed eaters you hear. The performance was totally unexpected, especially without the converter, WOW! My resonator is about 2.5 to 3 ft. long.

Some places did not carry Denso so I went with the Bosch, and I was not going to order the Denso off the web because of the shipping and the delivery time.

Hey everyone! Does anyone have a list of codes or can help me out with this one code? I had a code of 15, which is an 02 sensor. I replaced it. Now I have the code 16. Is that the other 02 sensor?

You should have a blue, 2 black, and a white on the oem sensor. The bosch has a black, 2 white, and a gray.

Blue to Black

2 Black to 2 white

White to Gray

This is for O2 closest to radiator. Im installing mine tomorrow because of code 15, along with D side window motor and regulator.

Just keep your eye on the oil level and find out when you need to change. I burn a little bit of oil too with the K8 and change oil about every 1700 to 2000 miles. I use 5w30 with 219,000 miles and the car still runs great. I have used some stuff called AutoRX. It seemed to help a little.

K8 DOHC 1844cc

I have 2.5 inch 2 chamber flowmasters on mine with no Cat Converter and it sounds damn good.

I put my original TB back on and got the idle where it originally was. Now the exhaust putters and when I let my foot off the gas it putters almost like a backfire effect but does not backfire. Could this be the TPS? If so, can I adjust the TPS while the car is running? Does the car have to be in di...

I put a millenia throttle body on my mx-3 gs to upgrade. The screw on top of the TB is 1/2 turn out from closed position, any more turns out and the rpms will rise (GND TEN mode). The rpms will also rise to about 1000 or more when i shift into gear (with more than 1/2 turn out). With 1/2 turn out it...