FD Exhaust system recommendations?
09-22-20, 06:29 PM
#1
FD Exhaust system recommendations?
So my FD is currently sporting a custom fabricated exhaust system that the PO built for it. It's a really nice piece of work, with quality welds from the V-band connection at the single turbo turbine housing all the way out to the dual tip tail pipes - it actually looks almost OEM. It's all 3" SS piping from the turbo to the muffler, and it flows really well. After living with it for a while though, I've come to the conclusion that it's TOO FREAKING LOUD, and the droning at highway speeds is ear-splitting torture.
My game plan is to just buy an off-the-shelf system, and modify my existing DP to mate up with it - since the existing DP is pretty long (it ends well past the bell housing, maybe about midway along the tranny's length), I suspect it will be long enough so that I can cut it down to size and get a new flange welded to the end to mate up with whatever off-the-shelf system I buy.
I'm looking for a system that flows really well, minimum 3" piping all the way back, presilencer/resonator replacing the cat (which I never had) and muffler. Stainless steel, high quality construction. Dual tips would be nice for that OEM look, but a single tip is OK if it's not too rice-y looking. Needs to be reasonably quiet when driving around town with a nice deep tone, no droning on the highway, but sing boosted rotary when I get on it - basically I'd like it to sound like my S5T2, which is running the Borla catback duals, with a Racing beat DP & presilencer.
What systems on the market today would you guys recommend that meet my criteria?
My game plan is to just buy an off-the-shelf system, and modify my existing DP to mate up with it - since the existing DP is pretty long (it ends well past the bell housing, maybe about midway along the tranny's length), I suspect it will be long enough so that I can cut it down to size and get a new flange welded to the end to mate up with whatever off-the-shelf system I buy.
I'm looking for a system that flows really well, minimum 3" piping all the way back, presilencer/resonator replacing the cat (which I never had) and muffler. Stainless steel, high quality construction. Dual tips would be nice for that OEM look, but a single tip is OK if it's not too rice-y looking. Needs to be reasonably quiet when driving around town with a nice deep tone, no droning on the highway, but sing boosted rotary when I get on it - basically I'd like it to sound like my S5T2, which is running the Borla catback duals, with a Racing beat DP & presilencer.
What systems on the market today would you guys recommend that meet my criteria?
The following 3 users liked this post by Project88Turbo:
09-23-20, 09:17 AM
#5
RX-7 Bad Ass
iTrader: (55)
In general, exhausts that have an oval/square can are going to be quieter than ones with a round can. Racing Beat and the Tanabe Medallion are excellent cat-backs that are easily available new and are sane with the noise levels.
I'd probably get a good cat-back then have a midpipe/resonated midpipe/high flow cat modified to meet your current downpipe. I'd rather hack up the center section than the cat-back.
A quieter exhaust does definitely cost horsepower but it's worth it not to go deaf
.
Dale
I'd probably get a good cat-back then have a midpipe/resonated midpipe/high flow cat modified to meet your current downpipe. I'd rather hack up the center section than the cat-back.
A quieter exhaust does definitely cost horsepower but it's worth it not to go deaf
.Dale
09-23-20, 09:39 AM
#6
Moderator
iTrader: (3)
Join Date: Mar 2001
Location: https://www2.mazda.com/en/100th/
Posts: 30,816
Received 2,587 Likes
on
1,838 Posts
i have a Japanese Rx7 magazine with a muffler test in it, and they were really thorough. its DB, dyno numbers, and a frequency chart. the TL;DR is basically that the larger muffler the quieter it was. pipe size barely made a difference, although the car was stock twins
09-23-20, 07:01 PM
#7
In general, exhausts that have an oval/square can are going to be quieter than ones with a round can. Racing Beat and the Tanabe Medallion are excellent cat-backs that are easily available new and are sane with the noise levels.
I'd probably get a good cat-back then have a midpipe/resonated midpipe/high flow cat modified to meet your current downpipe. I'd rather hack up the center section than the cat-back.
A quieter exhaust does definitely cost horsepower but it's worth it not to go deaf.
Dale
I'd probably get a good cat-back then have a midpipe/resonated midpipe/high flow cat modified to meet your current downpipe. I'd rather hack up the center section than the cat-back.
A quieter exhaust does definitely cost horsepower but it's worth it not to go deaf
.Dale
Yeah, the RB catback is on my short list - it's a quality piece. I can also pair it up with the RB mid-pipe/pre-silencer they offer, and then I'd only have to modify my existing DP to mate up with it. The end result would be a system that I could get replacement parts for without the need for custom fab work - if I end up swapping my turbo some day for something better, worst case is I can either buy an off-the-shelf DP that fits with the turbo, or modify my existing DP again.
Trending Topics
The following users liked this post:
Natey (09-23-20)
09-23-20, 08:31 PM
#10
Ive got the OBX-R knock-off catback. Its 90mm of Korean fury and has a big oval muffler- so its quiet.
Better quality and flow than RB in my opinion (though its quality isnt that great).
RB would be bottom of my list- pretty restrictive (15-30rwhp on single turbo) and from what I saw with TII Rev TII poor quality with mig welds and poor design/materials choice.
If you are baller get the 90mm RE Amemiya dolphin tail with 90mm midpipe. I think its under $2k.
Better quality and flow than RB in my opinion (though its quality isnt that great).
RB would be bottom of my list- pretty restrictive (15-30rwhp on single turbo) and from what I saw with TII Rev TII poor quality with mig welds and poor design/materials choice.
If you are baller get the 90mm RE Amemiya dolphin tail with 90mm midpipe. I think its under $2k.
09-23-20, 09:02 PM
#11
HKS DP + Bonez Ho-Flow + Racing Beat catback has treated me well for years. Before I had the RBs, I ran a PFS catback which also sounded nice and mellow...if that's what you're looking for. From what's been in the grapevine lately though, racing beat quality has taken a nose dive. If you want RB, probably be better to find a clean used one.
If you want LOUD, Apex'i N1s are well built and will **** off the neighbors.
If you want LOUD, Apex'i N1s are well built and will **** off the neighbors.
The following users liked this post:
CanyonRunner (09-28-20)
09-24-20, 09:57 AM
#13
RX-7 Bad Ass
iTrader: (55)
The biggest offender for melting the bumper valence is the N1 Duals, that has to be one of the worst exhausts out there.
Dale
The following 2 users liked this post by DaleClark:
Molotovman (09-24-20),
saiko88 (09-24-20)
09-24-20, 10:01 AM
#14
Moderator
iTrader: (3)
Join Date: Mar 2001
Location: https://www2.mazda.com/en/100th/
Posts: 30,816
Received 2,587 Likes
on
1,838 Posts
The following users liked this post:
Natey (09-24-20)
09-24-20, 01:19 PM
#15
Thread
Thread Starter
Forum
Replies
Last Post
3GRX7
3rd Generation Specific (1993-2002)
28
10-26-08 03:52 PM
1st to 3rd
3rd Generation Specific (1993-2002)
11
10-14-04 04:03 AM
rs_1101
2nd Generation Specific (1986-1992)
4
09-27-04 09:19 PM
Infini IV
2nd Generation Specific (1986-1992)
7
06-17-03 10:42 PM