85_whiterx7

its time to get rid of the stock exhaust. im not very smart when it comes to gas velocity and all that but it dosent seem complicated. the idea is an RB header with a borla xr1 and a presilencer. i have no idea what to put in between, would a straight pipe directly from the header to the muffler with a 2.5" diameter work ? should i go 2 inch? ive heard good things from a magnaflow muffler but im very picky about sound. im on stockport so im not expecting anything crazy a friend with an fc told me flames are possible would that be possible to do safely or should i stay away from flames period?

mazdaverx713b

iTrader: (91)

Why not just buy a RB street port exhaust from Racing Beat? I have the complete exhaust on my 80 and it sounds absolutely fantastic!

85_whiterx7

don’t those work best with a street port engine? I also wasnt trying to spend 1300 on it

85_whiterx7

Does anyone know anything about the new level motor sports header? Is there a difference between that and the RB?

KansasCityREPU

iTrader: (9)

Their just a reseller of other brands. A quick search of their site found they resell the pacesetter cats but I did not see any full exhausts or a headers.

85_whiterx7

this is the one But people say it’s crap

raven12aFB

You can use it on any motor ... I got a RB road race header installed on my 82 GSL. ....it will go all the way to the back 2.5 in diameter to a Magnaflow muffler.

rxtasy3

iTrader: (2)

while i agree on RB system being a bit pricey, it's a one and done kinda thing. unfortunately i haven't used anything else so i wouldn't know about other systems.

mazdaverx713b

iTrader: (91)

It works perfectly fine on a stock port engine. There's a noticeable power gain and sound is great. The cost is higher but as rxtasy3 said, its a one and done thing. No searching for parts or gaskets, fitment is great and it will hold up. Some other exhaust brands do not hold up well under the heat from the rotary's exhaust temps.

85_whiterx7

What about the heat shield racing beat makes. is that only recommend on the aftermarket carbs like the website says?

raven12aFB

I got the RB aluminum heat shield installed on my factory Nikki and intake..🤷‍♂️

85_whiterx7

is your header also heat tape wrapped

RX7_Renesis

iTrader: (1)

I zoomed into the lower left corner of the photo that raven12aFB posted .. and it definitely looks like the header is wrapped.

For a stock or lightly modified 12A .. I would recommend a 2.0" exhaust system. A 2.5" exhaust can support upwards of 400hp and may be a bit overkill.

85_whiterx7

ok thanks! Also what about the o2 sensors am I supposed to remove those or do they get plugged in to the connecting pipe or something

raven12aFB

Yes sir......it is....

yeti

iTrader: (1)

@85_whiterx7 There is not an 02 sensor from factory.

85_whiterx7

yeah I’ve been told now it’s a cat temp sensor

Frogman

If you really want a bang for your buck, run a straight pipe on the stock system. My car sounded better than a lot of peoples because it was broken lmao

85_whiterx7

by stock system do you mean thermal reactor with no cats or header no cats stock muffler

mazdaverx713b

iTrader: (91)

Only the 79 and 80 came with a thermal reactor. You car being an 85 will have a standard exhaust manifold. Removing the converters and keeping the stock muffler will make the car quite a bit louder. Tolerable but slightly raspy. My recommendation is still for the RB system. If I could post a sound clip of my car I would. I think you'd like it!

85_whiterx7

my tips are falling off my stock muffler I was planning on just doing the RB and getting rid of the cats Ive heard sound clips I’m just trying to find the difference in sound between a borla xr1 and the power pulse muffler

85_whiterx7

Should I buy the whole exhaust system or should I buy the pieces separately? I feel like it dosent matter though

Frogman

Stock 83+ / no cats = better than RB IMO ,

mazdaverx713b

iTrader: (91)

If you buy the RB exhaust, I would buy the complete system. No messing around with pieces and parts, gaskets, and fitment issues. Just one complete exhaust system and done.

Frogman

Yall sleeping on the no cat straight pipe , sounds like a angry lawn mower .