firstgen689

im putting 2 1/2 stainles straight pipe with mangnaflow muffler what do i do with the o2 sensors get ride of them or can i get some different ones or use stock ones ive done some looking all i find is stock ones

kgray

if you have a gslse you need them, but if not you can get rid of them. they arw a good tuning tool however

firstgen689

ok sweet i have a gs

Roundabout

iTrader: (8)

The GS doesn't have any O2 sensors... it is carbed

firstgen689

oh well then im crazy. it must be temp sensor or something

rotaxrave

probably for the overheated exhaust warining light

firstgen689

yeah ok. im just gonna take it to a shop

HEYTOYOTAGUY

on my gs i was able to use the original pipe. but an ideal is to weld the peatcock from the original pipe to the new pipe.

rotaxrave

get a presilencer in your strait pipes. It will make a huge differrence

firstgen689

is sound or performance

kgray

sound. i had the same 2.5" setup with one 6" round magnaflow and i got another muffler the next day! It made it hard to hear yourself think above 3k. Look into a borla presilencer.

firstgen689

mine is kinda flat about the size of the cat

firstgen689

does it sound ricy or muscly (if those are words) \

im still having a hard time to get someone to do it either they dont have equipment or the wont eleminate the cats cause it is illegal the say( only if caught)

kgray

it sounds rotary. Not too much like it. There is a RX-3 with a 13BT downpipe only here at the drag strip and it sounds nothing like any other (piston) car. Borla seems to be the best sounding, yet *some* have tried flowmaster with mixed opinions, most of them don't like. There was someone recently who had a flowmaster in and liked it, maybe you could ask for a sound clip?
You have to have a cat in ks? In mo, it's no problem and i'm emissions exempt

firstgen689

well they inspection guy didn't even check anything on the car but the vin. but i think i found someone

if al else fails i some duck tape pipe claps and bubble gum and fix her right up

aussiesmg

iTrader: (1)

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QuiescentWonder

Let me start this by saying that I know practically nothing about exhaust. I didn't see any exhaust specific section in the FAQ, if there is a good page for information on exhaust please direct me towards it.

Does anyone else have any experience with exhaust? What brand mufflers are quieter? Do presilencers restrict air flow? I looked and Borla doesn't have exhaust specifically for a 1985 RX-7 GSL and directed me to their "Universal" section. Can I buy the manifold, presilencer, pipes, and muffler all in one big package? Is Monza any good?

firstgen689

well magnaflow is what im putting on and everyone that has it loves it

QuiescentWonder

What is that? Catback exhaust, muffler? or can you also get manifolds from Magnaflow? How much of a difference would there be in using a catback or putting headers on there and eliminating the catalytic converter all together? I live in Florida, there are no emissions tests, I have no idea if eliminating the cat is illegal or not here.

Can I install headers, a high-flow cat, and different muffler? Or is it best to just eliminate the cat all togheter if I install headers?

Once again, I really have no idea when it comes to exhaust, or too much about cars in general, I'm a PC guy.