Ocelot

Ok, i'm torn between going with the Bonez 2.5" downpipe and high flow cat, and the racing beat 2.5" downpipe and presilencer. If anyone has sound clips of these with a stock catback, that would be great and very useful. Here are my pros and cons so far, so let me know if theres anything else I should consider, and which one you would choose:

Bonez System
-----------------
Pros - Quieter, Passes Emissions
Cons - More $$, Less Performance


RB System
-------------
Pros - Cheaper, Better Performance
Cons - Louder, Won't Pass Emissions Testing

I'm not really sure if louder is even a con for the RB system because i'm not sure how loud it will be with a stock catback. This is why I would greatly appreciate sound clips from both setups to help me make my decision.

My next inspection is due this coming December, so I have about a year to go before I have to worry about any of the emissions testing.

So what would you guys do in my situation? How much more performance would I see out of the RB system, and if its not a lot, should I get it just because its cheaper than the Bonez? Please add any useful input you may have, thanks again.

- Brian

Ocelot

come on, NOBODY has a single word of advice to give me?

neptuneRX

I have the bonez setup... on a bust rx7... but when it did run it sounded really good and had a beautiful exaust note. Sorry no sound clips

$150FC

the stock catback is going to sound kinda weird without cats anyway
i would get the RB, but i'd get the 3" instead of the 2.5.

Ocelot

I thought the difference between 3" and 2.5" wasn't that much? Also i'd like to keep it 2.5" for the better range of high flow cats I could buy and turn around and sell for temporary use for emissions testing. Not to mention i'm just going to get a wastegate port up to the stock flapper so don't want it freely flowing TOO much.

BlackRx7

I Vote the RB setup, I'd have to say RB exhuast parts are works of art I doubt you'd find a better product else where.

$150FC

i believe the gains between the 3" and the 2.5" are noticeable...with a turbo car the less restriction the better.

but for emissions sake, yes, i can understand your point. no emissions in AL

however, i should add ALTurbo2 blew his engine on a cold night with just the 2.5" downpipe. so... just fyi

Wankel7

Dude, there is no comparison what so ever.

Do you , or do you not need to pass emmisons? That is the question here. You are comparing two totally different things.

If you do need to pass emmisions the answer is clear. If not the answer is clear.

If you DO need to pass emissions every year get the Bonez system. Then buy the mid pipe. So you bolt in the cat for testing. Then go home and put your mid pipe in.

If you do not need to do emmisions testing then go with the Thunderfabrications DP. That is 3" and wide open

James

Ocelot

What was the cause of his blown engine though? Was he running lean, overboosting?

Another question, will the RB 2.5" dp bolt up with the stock cat or no? What could I do to get it to go on temporarily?

BlackRx7

yes the RB 2.5 will bolt to the stock cat....but it wont reach the rear section of the stock exhaust

Ocelot

I just realized my inspection is due up in June, not December. Anyways, i DO need to pass emissions testing, but only every two years. I'm looking for the easiest way to keep performance, but be able to slap back on the cat.

Ocelot

Do they make anything that will get it to fit?

Gibenstein

iTrader: (2)

Go RB ....

Ocelot

hmm....i think i'm going to actually go with the "**** it i'm going to worry about the emissions problem when it comes" approach. I'll probably just get the strength to just put all the stock crap back on, lol

Elysian

i had a bonez 2.5" on my 87 TII... that thing passed emissions with flying colors when coupled with the bonez 2.5" high flow cat... now i have the Racing Beat 3", but i have no cat, also the county i'm living in doesn't test emissions, so i don't worry about it anyways

Sideways7

iTrader: (7)

If you aren't worried about exchanging stuff to pass the emissions test, then get the RB stuff, no questions. All RB products are very high quality, and I'm not sure about Bonez stuff. I had a Bonez 2.5" race pipe, and when I bought the car it had an exhaust leak. When I got the car rebuilt I was told the race pipe needed to be replaced to fix it, and he was right. The flange that connected to the exhaust man. was very noticably warped, and it had been on the car at most for 25,000 miles. Just something to think about.

nataku

I am looking into getting either one of these, and I had a few questions I wanted to make sure of before I make any decision. I've got a stock header and dynomax catback if that helps answer these q's:

1) with the high-flow cat, it's a direct replacement for my stock cat, correct? so all emissions and everything else remains intact, and the installation is straight bolt on, right?

2) with the race pipe, can I run this with all my emissions intact (airpump, ACV, etc)? I have emissions testing where I'm from and I'll probably need to bolt the cat back up come emissions testing time, so I need it to be simple, since I'll need to swap them every time I get emissions tested.

3) how loud is the high-flow cat compared to just the downpipe? I'd probably get the RB header/bonez high-flow cat combo if I were to go the the high-flow cat route, so take that into account. Has anyone had experience with both of these setups?

4) how much power am I losing from keeping a cat in there as opposed to having just the race pipe?

I really want to keep the cat, but I know I can find a pretty good deal on the race pipe and it will be overall cheaper used or new anyways. And I'm worried about the noise factor, so if anyone can help me answer these, that'd help me out immensely, thanks!



edit: whoops, I hit reply on this thread instead of start a new thread....mods, can you please move this post into a new thread? thanks

mashing rx7

Go for RB i have the whole set up with a custom mounted cat. 3" dp lets more flow and sounds awesome,( planing to sell it soon, its just sitting in my garage..)
i got a new custom set up with rb 3" dp, rb presilencer and HKS dragger exhaust, Single exhuast on a turbo sounds crazy loud and if you have one you know we pop in that clutch when a cop rolls by. =\