Bukwild

Is your exhaust too loud? Try this

a Borla XR-1 oval. a few of you who have been within the 2 miles radius on my car above 3k rpms ear drums can rest easy. I bought a XR-1 from summit for $108 and added it to my 3 inch turbo back. Right after we welded it up I noticed the sound change from a "Japanese" car sound to more of a Ferrari deep rumble. It no longer has a high pitched rev. Fittiment under the car was great. I did however notice that I have plenty of room for a 4 inch exhaust system. Here's a few pics from the cell phone. sorry we forgot the video camera so I have no before and after sound clips.

Funkspectrum

iTrader: (5)

nice!

ddub

I did the same thing.

https://www.rx7club.com/2nd-generation-specific-1986-1992-17/difference-borla-xr-1-midpipe-will-make-videos-394393/

Bukwild

yes ddub your setup sounds much better with the borla.

SureShot

In all exhaust systems, the pre-silencer sets the tone, the mufflers set the loud.

My cat guts disappeared (by magic) 2 years ago, the big-ole stock mufflers still keep it quiet.

YearsOfDecay

I've been eyballin the RB 3" presilencer..... Pretty sure its a Borla Xr-1

The Griffin

Does anyone know the RB presilencer length? the cannister length not total lenght?..cheers

evileagle

iTrader: (1)

Good call.

I highly recommend the Borla XR-1. I've used them on a couple cars and have been happy with it every time.

RotaryEvolution

iTrader: (30)

i have the same setup and i love it.

WannaSeeMyWankel

Sound clip pleeeeeeeeeeeeeease

rodney87

I just happen to have one sitting next to me Its 16 in.

Nihilanthic

What exactly is a presilencer? is that like a muffler? I've heard of glass packs... lol.

Basically all I know about exhaust is how to make them flow, not make them quiet. But, Im quickly finding out I need to learn more about the latter... hah.

aderson34

dont mean to hijack this thread but, im thinking about getting this to quiet down my Rb head/silencer to single muffler.... should i use this as a muffler or try and fit it inbetween my presilencer and muffler if possible?

kontakt

Before my coolant seals blew, and I decided a rebuild w/ streetport was in order (hence headers, corksport, xr-1's) I was trying to figure out which size XR-1 (shorty or normal) 3" oval I could fit 2 of on a rx7.com racepipe. Now I'm gonna try to run one right after the header, and one wherever else I can fit one (be it shorty or normal) before the muffler on the CS.

Syonyk

A presilencer is a muffler type device installed before the main mufflers. They're usually of a straight through "glasspack" design, but don't use a traditional glasspack with fiberglass or such - the higher rotary exhaust temperatures will melt the packing material in very short order. Rotary presilencers are of a heavier construction with steel wool packing that can take the temperatures.

They're generally installed in place of catalytic converters.

-=Russ=-

redlineracer

Ok let me get this straight, you installed the borla between the header and the y pipe.

Molotovman

iTrader: (49)

My mufflers look exactly like that, btu theyre round cans. MY car is way too loud, if I had a custom exhaust made with those back after my cat, and some chambered mufflers too, how would it be?

coldfire

iTrader: (1)

do you guys think this would quieten down the exhaust more so than the Bonez high-flo cat (the one that goes between RB header and y-pipe)?

i was thinking about the Bonez for making the exhaust quieter, because then i could be semi-environmentally friendly also, lol...

Molotovman

iTrader: (49)

heres what mine sounds like. Download the file, it doesnt load that fast.

http://www.picapic.net/media/QVW27KR84Q8GV4

Bukwild

Cats suck. Go with a midpipe muffler never a cat.

GodSquadMandrake

So the Borla XR-1 is still straight through? I think it would still be pretty loud wouldn't it?

coldfire

iTrader: (1)

you are saying that a muffler, such as this Borla one, placed in the stated position, will:

1) flow more
2) reduce sound output more

than a high quality high-flow cat? that is all i am asking.

ddub

High flow cat will probably reduce sound more, but I doubt it'd flow more.

Parastie

A true Cat, even a high flow, will quieten the sound more then a presilencer will. A Cat is designed to change the chemicals in the exhaust and must intercept the exhaust to do so.

A presilencer is not a cat and will be much louder, but will flow better.

coldfire

iTrader: (1)

yeah, i just don't think a presilencer will be quiet enough though...maybe a better question is what is the performance difference between, let's say a muffler like the Borla here, and something like the Bonez high-flow cat?
if it is neglible, i'd rather take the cat since it would be quieter and make the air around my car breathable, lol.