I know there are a lot of threads with single exhaust covered in them, but I just wanted some quick advice .. I have an '86 FC N/A with Racing Beat headers i have yet to install... and on my list for mods to the FC (exhaust system), I was curious as to what should come next. I was thinking the Racing Beat presilencer going to a single exit exaust cat-back system. Performance-wise and preferably not extremely loud, which single exit exhaust cat-back system for the N/A .. I know that 2.5" would be the best bet for opening up the 5th and 6th ports and good backpressure.. i would like some advice please.. im looking for something that I can purchase for around 200-300 dollars..

 

for na go with dual exhaust...single is good for turbos....and umm ur text is kinda big there

 

well if you want more bang for your buck then get a apexi n1 or gt catback. they both come with presilencers all you need to do is put a cat replacement pipe in. my apexi gt cost about 490+shipping. and the good thing about it is its stainless and it is all 1 peice from the cat on back. and the difference between the n1 and the gt is the piping in the muffler n1 is 2.75in and the gt is 3in

 

i have RB headers.. with apexi N1..

it's ****** loud...

sometimes if i get on it alot.. with the windows down, i come home with ringing ears (like u do when ur in a club)

but it does have a throaty growl i must admit...

 

I have to agree with what has been said, a single exhaust on the NA will be loud on a higher budget, and EXTREMELY loud on a 200-300 dollars budget.

If you don't want a "Hey Mr., PLEASE pull me over" loud, you NEED a pre silencer and a cat back. Either the RB pre silencer or a NICE HIGH quality custom mid pipe such as a SS borla long muffler.

If you use $100 dollars mufflers, the end product will be extremely loud!

BTW - Do not use anything larger than 2.5.

 

great.. thanks for the help.. if i go with the Racing Beat presilencers... it will cut down the sound decibel by quite a bit right? so after the presilencer.. would apexi gt , n1, or corksport be the better bet? how quiet willt he presilencer soften the exhaust?

 

The racing beat header + presilencer combo will still be extremely loud with an N1 style exhaust. They key to quieting down exhaust is the use of a large muffler. N1 style mufflers are tiny. Borla and Racing Beat mufflers are huge by comparison. Find a muffler that fills alot of the area where the factory mufflers sit and your exhaust shouldn't be too loud. Oh and the Racing Beat presilencer is tiny, which makes me doubt that it really does anything at all besides fill the gap between the header and catback, and maybe offer you 3% noise reduction .

 

so with a louder single exit catback.. what would be the best bet to connect between the RB Headers and the catback? i've been hearing a lot about resonators.. and secondary resonators

 

If you really want to go single and with headers and not be loud you are going to definately need another muffler in place of where you'd put the RB presilencer. The borla XR-1 is a popular choice, and get the largest you can fit. The setup will still be loud, but should be tolerable...if your rear muffler is a good big one as well.

A friend of mine had an RB header and straight pipe. He used to have an old Trust exhaust on it that sounded ok and wasn't too loud (pretty good sized mufflers). He blew a big hole in a muffler and went to a local shop to get a new exhaust fabbed up. The threw "focuz motorsports" fart cans on a custom y-pipe they made for him. They are basically generic looking N1 mufflers. Holy hell the car was loud. He went back to get a borla muffler added in instead of the straight pipe and that helped alot, but the car is still ALOT louder than mine with the RB header/prsilencer and a borla exhaust.

If I was really set on going single, I would look at putting 2 or maybe 3 mufflers in line, all good sized ones.

 

what do you mean by in-line?

 

in a line...in a row...

sounds like you want a single exit exhaust, in which case if you want it to be quiet you will need 2 or 3 mufflers end to end with some piping in between.

 

I'd go with the whole RB system.....I can honestly tell you that the RB header and presilencer and any OPEN catback will be TOO LOUD......your safest and quietest bet is the whole RB set up. TRUST ME WHEN I SAY LOUD!!! we drove ALMOST cross country on my fiancee's GTUs with RB header, presilencers into APEX DUAL N1's and we stopped for earplugs less than 100 miles into the 2600 mile trip.

 

does corksport provide much of a performance upgrade? or is it just look, sound, and just a tad of kick? I can't speak from experience here.. I just want the best deal... perhaps if anybody out there has a 2.5" piping diameter cat-back they are trying to sell? I just really want something that I can spend around 200-300 on and not be disappointed.

Does a removable silencer that retailers sell really bog down performance that much? And another thing, does it help dramatically also?

 

hmm.. well then.. if somebody would sell me a RB system for around 200-300 used then I would definitely go for a RB N/A system for my '86 FC... *sigh*

 

NA you need some backpreassure ( the RB presilencers will help you with this there is a tube, like the one that goes to the stock cat, that opens the 5th and 6th ports) but any open catback like the corksport, HKS, or any open CANISTER (N1 style cans) will be stupid loud.

 

If I did it all over again, I would get the racing beat exhaust, or borla if on a budget (which I have now). As a word to the wise, save up a little more money and don't put on the header until you have a decent exhaust. I made the mistake of putting on the header with the stock catback and boy did that sound worse than I ever could have imagined.

Oh right an '86 *smacks forehead* you will need the RB presilencer to keep your ports working like Madrx7racer says, unless you can figure out something else for it. Also as per his saying about the loud exhaust, HKS actually does make a comparable exhaust to the rb/borla (dual exit with decent sized mufflers) that I know is available through mazdatrix, or at least used to be. It's not much cheaper though...

edit: the hks exhaust is more expensive woops

i wonder how their walker/dynomax exhaust sounds...looks like it should muffle fairly well. give them a call and ask.

 

i saw the borla and the hks dual-style exhaust on mazdatrix.. and i didnt think of them as asthetically pleasing.. but again. I already have RB Headers (not-installed yet) , i will most likely get the RB presilencer, and as for the exhaust... I'm still undecided...

If i go dual, then I would go RB... Racing Beat are performance-wise top-rung (correct me if i'm wrong) , and the rest of the single exit exhausts dont help that much ? just weight-reduction ( as i hear very often ) and sound deafening... but what about performance of them? ?

But If I were to go single exit exhaust, what would be the best? and would the removable silencers help at all? Which would give me the best performance?

 

removable silencers help but not much.....I wouldn't recomend ANY single exhaust if you are going to run the header and presilencer.......as i said countless times: IT WILL BE STUPID LOUD (which i believe you are trying to avoid)....the single eshausts will perform almost as well as the RB because you will have the presilencers to help with backpressure but RB is MUCH quieter than the open catback....jesus christ sfeels like i've been saying the same thing over and over again.....oh wait I HAVE!!!!!!!!!!!!!

I am now, officially done with this thread.

 

hehe sorry i just want all the information i can get = ) i thank you very much for your enlightening of me in this subject.. thanks

 

wouldn't that be a custom job ?

 

yep. depending on the muffler price you might be able to find a muffler shop to make it within your budget.

on and for those silencer inserts, they are crap. they make the exhaust quieter by effectively limiting the exit point to 1-1.5 inches. you will definately feel a huge drop in power with them in.

 

ohh gotcha.. i guess im goin to try my best and find a RB system used

 

my friend had a Greddy single exhaust system in his 89 GTUs and it wasnt loud at all.semi loud at WOT.. maybe since he didnt have the RB headers? or presilencer?

 

i got my full RB turbo back for 400 bux..........so it CAN happen.....check www.teamfc3s.org in the for sale section. good luck.

 

thanks man