hey ill be getting an sp2 and high flow cat soon... is this over kill? lol also is it hard to change the cat? ive never done this but doesnt seem too hard... do i need a sealer or anything before i bolt them back on? also what about the 02 senor... what do i do about that if i switch out the cat? Is there anything i should be worried about breaking while i take anyhting off? thanks


ps someone really needs to make a DIY.. so many threads say look for the DIY but doesnt seem likeone really exists...

 

Swapping out the cat. is easy. It is 3 bolts on one side, 2 on the other. Just re-use the same gaskets. A potential problem is the O2 sensor is a BITCH to unscrew without stripping. Have a lot of break-free/WD40, and don't be surprised if you break it. Very easy to swap it after you get it out. the bung is built into the top of the cat on the SR unit.

 

lol whats a gasket? haha what is the o2 sensor made out of? from what it sounds like its a piece of paperlike material lol... is it hard to figure out what the 02 sensor looks like? lol

 

Maybe... have someone do this for you...

 

Is the problem with the O2 sensors unequal force on the wrench when removing it? If so, would a impact wrench work better for removal?

 

maybe i wont mess with the cat.. how much is a replacement o2 sensor and where can i buy one.. incase i do fck it up? also if i go to a autoshop would the just do that for me? lol (swap o2 sensor)

 

You get an O2 sensor at the dealership. A few (OK, actually several) of us who have put this in have stripped it. It is plastic, and Mazda has just jammed it in there from the factory. Some are lucky, most are not when getting it out. It's a plastic plug that goes into a bung (that is a hole in your cat), with wires attached to it. If you are not sure about this, you are better off taking it to a muffler shop. Whole process should take about an hour or less.

 

is the greddy suppose to come with bolts?

http://www.rx8web.com/Pictures/greddy1.jpg

i noticed in that picture inbetween the catback and pipes there seems to be silicone/paper type thing that seems to keep it air tight? is that something thats suppose to come with the greddy?

i bought it used off a forum member so im not sure if it came with everything? what should i do about the bolts?

 

ok nvm talked to the guy...

i looked under the car today to check everything out.. seems simple.. but where are the spring loaded bolts?

 

ok scratch that lol

what is included in the exhaust kit? i think im just gonna call greddy to see if i can get some from them...

anyone know how i can go forth in doing so like a number to call? hahhah sorry for being such a nooob

 

can i use anybolts to connect the pipe and catback? sorry for so many posts... im so excited and want to install them nowwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwww

 

oh yeah gasket is the silicone piece between the pipes?

 

uhh...i dont think the gasket is made out of silicone. its some other form of metal thats really really really fragile. its really easy to do. but in your case, i think you should ask someone to help you out. and DAM YOUU!! i wanted that greddy xP

 

haha what happend to your setup? LOUD but sounds sick.

as for the silicone gasket... i saw it on this link..
https://www.rx8club.com/showthread.p...ht=diy+exhaust
maybe he ment the metal one and silicone with it?

 

Wait so are you saying that if i where also to go w/ a high flow cat my 02 would go off?

 

No, you reuse the O2, and it works correctly with no CELs, but the unit itself can be fragile and you may break it while trying to remove it.

I had my car for a year of driving before I swapped out my cat and I had no problems taking the O2 off with a monkey wrench.

 

ok so i tried installing it didnt work.. im gonna go to a shop to do it... what price range am i looking at? also anyone think the sp2 and high flow cat will be over kill and be obnoxiously loud? i rarely drive with my windows so i dont think it would be as loud...

 

it won't be obnoxiously loud, don't worry. i have the greddy w/midpipe and it sounds great -- you'll be in the same sound range too

 

by anychance do you have a sound clip? thanks for the help!

 

well whats the better system?? Greddy or Borla, for sound and performance?

 

No difference in performance. Sound depends on you. Both of loud & deep.

 

never updated... had it installed for a few weeks. i love it, kinda loud at cruising speed, lot louder then stock so its easier to hear when to shift.

PLUS i seemed to get a 2mpg increase... and this was with pretty aggressive driving.