FtotheC

I'm thinking of cutting up the stock exhaust from my 87 na and removing all three (there's three right?) catalytic converters and just putting a straight pipe all the way back from the exhuast manifold...I'm thinking of chopping the dual mufflerthing and just converting it into a single pipe, folding and welding from the start of the y-pipe...

...hmmm, the only thing I'm worried about is affecting the 6 port actuators because aren't these controlled by back pressure?...damn...

...and I am not worried about emissions and noise levels;the louder the better ...try and catch me coppas!...

Madrx7racer

ur cutting? Y not just get each piece new or even used......header, midpipe etc.... and the louder u are doesn't mean that you are fast.......what are you? a previous Honda driver? j/k seriously y are u going to cut?

Sideways7

iTrader: (7)

RB makes a damn good pre-silencer/downpipe combo for about $300. Its one of the only setups out there that will allow the aux ports to operate properly with a free-flowing exhaust. Most only work if there's still a moderate amount of backpressure. Also, there are several good single pipe exhaust setups out there that dont cost a whole lot. If price is an issue, I'm sure you can find them used. I actually found a very good condition Apex N1 pipe on a rx7 at a junk yard a few weeks back.

$150FC

ahem.

if you've never heard straight pipes on a rotary, you might want to be careful what you wish for.

Sideways7

iTrader: (7)

Just make sure you at least have a pre-silencer. A true strait pipe on an NA rotary is nuts. It is beyond what anyone would even want on the streets. I dont care how loud you want it, its too loud.

ajsuper7

this is true, it will sound bad and be so loud you wont be able to think, i recomend buying the racing beat or bonez presilencer to a high flow muffler....doesnt kill your ears and sounds pretty good.

Sideways7

iTrader: (7)

I wouldn't personally reccomend the Bonez race pipe. It has something to open the aux ports, but it requires backpressure to work. I used to have one on my car with an Apex N1 cat-back, and it wouldnt open them. Also, on the Bonez pipe, the flange that connects to the exhaust manifold was hopelessly warped due to the heat from the exhaust. The RB one is much higher quality materials.

TwEaK

iTrader: (6)

lol trust me i know loud i have a str8 pipe and i want to get rid of it if i do get a real exhaust system ill give you mine for free lol it needs to go sound like MAJOR RICE!
TwEaK

bendover00000

...



damn, dead giveaway...yes I am a previous Honda owner...

...

FtotheC

I don't know how the hell I did that ^...

Speed_Machine

I dont think its a good idea to admit to that in this forum.

genII Drifter

I'll take it.

I heard a racing beat dual exit header last night with presilencers and no cat-back. It wasn't too loud. Maybe it just depends on how quiet a person you are.

FtotheC

alright, I take back all previous statements...

...I just want to know if it will work if I just leave one cat on, probably the one closest to the downpipe, that I will keep enough back pressure to open up the ports..that's it...

1987RX7guy

iTrader: (3)

Dude it sounds louder than a stang on straights. O_O

I drove for ~10 miles like that on my 87 and it was awesome but damn!! its still louder than I could tollerate. Those RB rear mufflers on the true duals really pull their weight.

Santiago


I love RB

TwEaK

iTrader: (6)

ok genII drifter once i get my exhaust ill give you mine
TwEaK

genII Drifter

you got it yet?

I just got mine in the mail. racing beat streetable header, and presilencer.

There is a hole on the presilencer, and one on the headers. what could I use to plug them?

Also what do I use to widen the holes on the headers where the presilencer fits.