Quick poll - singe or twin?

[m1tch]

Should I go for this kit:

http://cgi.ebay.co.uk/Mazda-RX7-FC3S-1986-1991-3-Cat-Back-Exhaust-System_W0QQitemZ270319904953QQcmdZViewItemQQptZUK_CarsParts_Vehicles_CarParts_SM?hash=item270319904953&_trksid=p3286.c0.m14&_trkparms=72%3A1683|66%3A2|65%3A12|39%3A1|240%3A1318

It looks like the UK version of KrisD1s full system (I have found that he can get the full system ie turbo back, as the downpipe is for LHD cars and won\'t clear the steering rack)

Should I perhaps go for that as a cat back and then go custom downpipe and midbox?

[colin5524]

definatley twin, i made a 3" tuerbo back system all the way back, had some big jap chimneys and the noise wasnt ott sounds lovely on rev up, i cant see the need for 4" unless youve got a huge ass turbo,  that system looks pretty decent my exhaust is marine grade stainless 314,  but 304 stainless is very decent, good price to.

[pdtaylor18]

that system is by SSautochrome and it will mate very nicely with either a OBX or japspeed downpipe as they are all made by same people. Thats the combination on my cab. Think even the XSpower ones are ssautochrome as well.  I have had no problems so far on mine and it does growl rather nicely.

[richrx]

how loud do you want it? i bought a cheap cat-back for my FD and it was rediculus....attack of the killer bees kinda sound :2Confused i ended up buying another from WGT which had been tried and tested and sounded looooovleeeeee :burnout

i\'d say give them a call first, spend a small amount extra first time round rather than take a risk in the ebay jobby

hope i havent confused things



richard

[pdtaylor18]

Thing is there is no risk as its been tried and tested on several cars including mine.  With that particular exhaust it does not matter if its bought of Ebay in USA,UK or some private sale its still made by the same people SSAutochrome. I\'m not saying they\'re the best cos they are not but its value for money.  The only option is to have one made, really easy for any decent exhaust chap to make as its so straight, just need a downpipe but even that could be made. I doubt you will get much change from £500 doing it that way in high grade stainless and some quality boxes and tips.

[Alex_Eng]

Noise is related to gas velocity to the power 8, therefore a single exit is much much louder than twin( gas velocity is half on a twin compared to a single, roughly LOL). I have a single stright through system 3inch which I swapped for my old  3inch twin, and the noise levels are so much louder! it is the loudest road car I have ever heard!!!

Did get the whole system turbo back for £150 brand new, SS304 as well.

[Alex_Eng]

Should I go for this kit:

http://cgi.ebay.co.uk/Mazda-RX7-FC3S-1986-1991-3-Cat-Back-Exhaust-System_W0QQitemZ270319904953QQcmdZViewItemQQptZUK_CarsParts_Vehicles_CarParts_SM?hash=item270319904953&_trksid=p3286.c0.m14&_trkparms=72%3A1683|66%3A2|65%3A12|39%3A1|240%3A1318

It looks like the UK version of KrisD1s full system (I have found that he can get the full system ie turbo back, as the downpipe is for LHD cars and won\'t clear the steering rack)

Should I perhaps go for that as a cat back and then go custom downpipe and midbox?

LHD and RHD downpipe is the same! Rumours are a killer. The downpipe and back of the turbo are no where near the steering rack!!.

[m1tch]

LHD and RHD downpipe is the same! Rumours are a killer. The downpipe and back of the turbo are no where near the steering rack!!.

I asked the seller of the full kit that KrisD1 has and they said that it won\'t fit the RHD cars, which is why the UK seller only sells the catback part of the system.

Btw, if I get a standard cat-back system, will an aftermarket downpipe and decat fit if its connected to the manifold that moves the turbo forward? I know HKS have a manifold that keeps an aftermarket turbo in the same place, but other makes move the turbo forward eg:

HKS manifold (its central)


Most other manifolds (including mine)

[m1tch]

Noise is related to gas velocity to the power 8, therefore a single exit is much much louder than twin( gas velocity is half on a twin compared to a single, roughly LOL). I have a single stright through system 3inch which I swapped for my old  3inch twin, and the noise levels are so much louder! it is the loudest road car I have ever heard!!!

Did get the whole system turbo back for £150 brand new, SS304 as well.

Isn\'t that just a pipe with a flange at the end then lol

[m1tch]

Just checked the janspeed site: http://www.japspeed.co.uk/Mazda-RX7/Mazda-RX7/Mazda-RX7-FC3S-Cat-Back-Dual-System/p-13-1-194/

Thats the same pic as the one online and they say they use the T304 stainless steel

[Prof]

LHD and RHD downpipe is the same! Rumours are a killer. The downpipe and back of the turbo are no where near the steering rack!!.

I disagree - some downpipes can foul the steering rack on RHD cars.

[m1tch]

I disagree - some downpipes can foul the steering rack on RHD cars.

Which is why I asked

[Alex_Eng]

I asked the seller of the full kit that KrisD1 has and they said that it won\'t fit the RHD cars, which is why the UK seller only sells the catback part of the system.

If fits I tell you! Its is the downpipe I have on my car.

[Alex_Eng]

http://uk.youtube.com/watch?v=Q73Vgw17d2U&feature=channel_page

Check my car out

[m1tch]

Is this what you got from the states then:

http://cgi.ebay.com/ebaymotors/RX7-TURBO-2-II-FULL-EXHAUST-80MM-RX-7-FC3S-Turbo_W0QQitemZ170291209761QQcmdZViewItemQQptZMotors_Car_Truck_Parts_Accessories?hash=item170291209761&_trksid=p4506.c0.m245&_trkparms=65%3A3|39%3A1|240%3A1318