Exhaust Question

Stoney89 · Post by **Stoney89** » May 24th, 2007, 10:18 pm

I have a 95 mx-3 1.6L DOHC and i was wondering if there is supposed to be a flex pipe after the header? I also just discovered that my header is almost cracked in half. Some parts of the exhaust were replaced before i bought the car and i was wondering if they did not put the flex pipe back in place where it was supposed to be and thats why the header is cracked. I have never seen a header with this big of a crack. Anyone got any idea's

cyclonekid78 · Post by **cyclonekid78** » May 24th, 2007, 11:02 pm

Flex pipe is right after header. Maybe the car was bottomed out an hit the exhaust manny.

Stoney89 · Post by **Stoney89** » May 24th, 2007, 11:36 pm

Yea thats what i thought there should have been flex pipe after. The person who fixed the exhaust before i got it replaced the flex pipe with a piece of straight pipe for some stupid reason. Thanx alot.

SuperK · Post by **SuperK** » May 25th, 2007, 9:33 am

I think it depends on the model. My 95 is factory exhaust lines and doesn't have a flex pipe.

Stoney89 · Post by **Stoney89** » May 25th, 2007, 8:42 pm

hey superk Does your stock exhaust have a split piece of aluminum clamped around the exhaust pipe after the header and catalytic converter?

Stoney89 · Post by **Stoney89** » May 26th, 2007, 3:24 pm

Or Does anyone have a picture of a 95' 1.6L DOHC stock exhaust. :?:

Tunes67 · Post by **Tunes67** » May 26th, 2007, 3:41 pm

Yup.. I used this pic for a write on how to change your ATX filter.. but the pic also shows the stock exaust upto the catalytic converter. Might want to take a bit of time and read through the FAQ sections.. all kinds of good info in there and you would have found this picture as well

Cheers

Tunes67

torpedan · Post by **torpedan** » May 26th, 2007, 10:24 pm

Stoney89 wrote:I have a 95 mx-3 1.6L DOHC and i was wondering if there is supposed to be a flex pipe after the header? I also just discovered that my header is almost cracked in half. Some parts of the exhaust were replaced before i bought the car and i was wondering if they did not put the flex pipe back in place where it was supposed to be and thats why the header is cracked. I have never seen a header with this big of a crack. Anyone got any idea's

Heat will do in headers overtime, I want to say the stock header had a little bridge easily that could crack but i really do not remember. Is it a cast manifold or an actualy tubular header, the tubular would not be the stock ones and they also crack mucher easier.

Mx-3s as I recall do not use flex pipes, many manufactures go the cheaper route and employ a "joint" in the system that can flex. If you look at the large flange on the picture above you can see two springs on the bolts. This sytem alows the system to flex, not as much as a flex pipe but still enough to prevent problems unless the system suffers a significant impact, IE getting rear ended. From my experiences its hard to bottom out and hit anything but the toe hooks up front.

Stoney89 · Post by **Stoney89** » May 28th, 2007, 1:45 am

Thanx 4 the info. Helps alot

mazda_mx3r · Post by **mazda_mx3r** » May 28th, 2007, 8:15 am

ummm i have to disagree with you,when i went to a custom muffler shop to get my exhaust put on. he pointed up under my car and said a needed a new flex pipe. because the braiding was coming off of it...i dont know though,but mines a 93...it was all good though got 2 inch mandrel bent piping plus a performance muffler and the flex pipe installed for 280!!!

reaper of souls · Post by **reaper of souls** » May 28th, 2007, 1:42 pm

some came with a flex pipe installed on some didn't mine was just a down pipe with spring loaded bolts right before the cat i belive that it's this kind of set up on all the dohc engines that have a pre-cat on the headers but i perfer to not have a flex pipe it hurts exhaust flow by a very tiny bit mind you but enough to piss me off the smother you can get the engine to flow the better power and mpg you can achive.

94blaze1.6 · Post by **94blaze1.6** » May 28th, 2007, 1:50 pm

reaper of souls

so is that why ur home made intake didnt have a filter on it on the mx u sold me? do me a favour and stfu if anybody seen what u did to the mx u sold me and all ur 'mods' u would be the laughing stock of this board. You no longer drive an mx so do us all a favour and dont post!

Cheers

reaper of souls · Post by **reaper of souls** » May 29th, 2007, 5:20 pm

actually i still have the filter off my old mx i removed it and kept it mabye next time you should take a look at the car before you buy like i said in the post when it was for sale and over the phone AS IS not my fault that your not bright enought to look at a car before you buy an i may not have a mx anymore but there are many others still on the board that have gotten rid of there mx's and are still here so do us all a favour and shut the hell up and stop stealing some one else's post that is asking for help

Reaper
Greg

94blaze1.6 · Post by **94blaze1.6** » May 29th, 2007, 9:34 pm

Taking off the intake filter before selling the car is a very common practise! Sorry i completly forgot about that one...

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