Hi everyone.
I have been away for a while..
Health problems and after lockdown with covid my poor rx8 has been neglected..
the tyres are cracked and the exhaust back box rusted and broken.
Got 4 new tyres today..
Changed out the backbox and re gassed the ac..
She's nearly street legal now.
waiting on a re spray for the paint.
mazda took her in for a heap of recalls too.
She haS a custom straight through midpipe..
loads of power and sounds great. however as everyone involved with an rx8 knows ...they absolutely stink out the back with no cat ..
The car is currently banned from the driveway because it stinks up the front of the house.
I have a custom catalytic converter nearly finished..
my last one was stolen by dirtbags along with the 02 sensors and exhaust manifold/headers.
the one thing I am lacking is the triangular flange to connect it to the header/manifold.
I don't want to disturb the 02 sensor too much...i haven't removed the straight through yet so I am struggling to get measurements .
would anyone have a cat or header/manifold lying around that they could give me accurate measurements.
I can get a generic one or.manafacture one as my friend runs a metal fabrication shop.
my measurements so far are 63 mm across the bore /or 2.5 inches.
130 mm to one side of the distance on triangle or hypotenuse.
The biggest problem I'm having is measuring the distance between the bolt holes which is probably the most important..
I got 100mm on one side and 110mm on the other..
This can't be right..
could anyone please please measure one if they have access to one off a car.
I rang loads of breakers and suppliers and mazda but no one is bothered measuring these.
I have my flame🔥 retarded suit on so please don't flame me..
this is economical for me as I'm doing it on a budget..
the resonator was left after the thieves were done so I've essentially half of the cat fittings..
Thanks again.
Just putting on my flame suit..
I was out for a spin today..
i forgot what an amazing machine this is.
Bose stereo cranked up.
and ps yes I've searched the forums for these measurements with no.joy..
before anyone points that out

 

What did you measure it with?

If you have dial calipers, measure the diameter of the hole.
Measure the distance between the holes on the far sides.
Subtract the diameter of one hole and that will give you an accurate measurement.

 

I am in a similar position and every exhaust shop I've tried so far, even ones that do custom work, have asked me to bring the flange. These are 2 options I've found and the first one includes some measurements. I haven't pulled the trigger cause shipping to Canada sucks and trying to source something locally

Mazda RX8 Downpipe Flange, 1/4" Mild Steel

This one says does not fit stock manifold/header... But the Racing Beat midpipe does got the stock header so idk why this wouldn't?

https://mazdatrix.com/product/flange...o-header-rear/

 

you really need stainless steel or it will rust like crazy

.