nates7

I just bought a bonez 2.5'' racing pipe. I am now looking for a cat-back system with good sound and HP gain. I want to spend about under $500.00 and keep it dual. What is a good system to buy?

1987RX7guy

iTrader: (3)

First of all you will loose your auxilary port actuation if you are putting in on that 87 N/a in your profile. Second if you need cheap go with "borla" for a cool 100 or so more you can have Racing Beat which is the KING of exhausts

Santiago

PS- unless you have a massive turbo and need more flow

cezonetheillest

i'm from tx but i can't remeber if there are emmisions or not. but if not then just get a down pipe with no cats at all and i think that you could do some silencers also not to sure though. mine sounds great but i have no cats with a strait pipe to a glass pack(i think) then to the y then to the mufflers.

Icemark

updated title to actually reflect the question

nates7

what would be the result of the auxilary port actuators no working right.

Aaron Cake

iTrader: (1)

Covered hundreds of times before (search). But the short story is massive (around 30HP) HP loss above 4K.

KiyoKix

That is...30HP if they're closed assuming you just keep them closed that's what he means . Opening them is a different story in which you lose power on the low end...which is still bad but a much better sacrifice if you do make on at all. Choose wisely (hint...keep them working even if you use an air pump and rpm switch) .

PvillKnight7

iTrader: (16)

The first one!
http://www.rx7trix.com/store/customer/home.php?cat=137

skydivr73

he said he wanted to keep it dual.....

Zer0 Cylinder

gut cats + dynomax cat back.

PvillKnight7

iTrader: (16)

Sky- well then show me a decent premade catback system for under $500.

Zero- Dynomax makes a catback system for rx-7's? Got a link?

YearsOfDecay

Racing Beat..... there simply is no substitute!!!!!!

You can get the six ports working again with a summit RPM switch, a solenoid, and some plumbing parts. (do a search you will find it)

I'm selling two RB mufflers in the parts section.

Zer0 Cylinder

you can buy it through advance auto......like $250 retail and sounds great.

truespin88

I checked their site.

$440.

3RotorRocket

JIC Titanium Cat Back = very pricey though

Zer0 Cylinder

hmmmm i bought mine about a year ago for $200 with my friends 20% discount, the retail was like $250....id call the local store and ask. they can pull it up on their computers in like 30 seconds.

retail NOW is $278
part no: 17-440

just called and checked for you.

truespin88

Eheh.


I looked it up on their site. My local store = $440.

Zer0 Cylinder

inquire as to why the price is that way, they'll probably match it.

rxspeed87

whats this talk about about losing the secondary ports?

the 2 1/2" dp shouldn't cause him to lose his aux ports
same thing with a cat back

right now my setup is a RB header with 2" pipes off the block into a 2 1/2 inch pipe

then it goes to my stock rusted out non existant mufflers

my 6ports open
why wouldn't his?

91mazdarx7

from all the reading i do on this website i got this go with racing beat corksport or apexi N1 once i finish my tII conversion i will be getting a rb header and exhaust

truespin88

Sure about that, pal?

seven1997

iTrader: (2)

The Borla is a nice system and sounds low base. It also doesn't make your car look like its got a bad case of Hemrroids like the Racing Beat and the other more expensive muffler cans do.

If you shop around you can get the system for around $415 to $425 shipped.

1987RX7guy

iTrader: (3)

If you know anything about how S4 auxilary ports work you would know why a "race pipe" i.e. a straight pipe would make his ports and anyone elses ports non-functional. Do some research and find the answer for yourself.


Santiago

rxspeed87

by race pipe you refer to a little 2 1/2 inch pipe comming off the stock exhuast manifold into a pre silecner or far enough back to the cat back right?

what would the difference be between this and my header system into a straight pipe going to the cat back? and why is it if this straight pipe is supposed to prevent the 6pi from working why do mine still work? and no I'm not using the RB pre silencer but rather a straight pipe in it's place

as far as how the 6pi work it is based on exhuast backpressure (which mine is still setup to run off of) and once it reaches the right amount of pressure to overcome the actuators they open up.

so I know a little about how the 6pi works but still it doesn't answer my question as mine work and I have seen others work

nates7

ok I am going with the borla cat-back system. I found it for $400.00 shipped. As for the race pipe it is the bonez 2.5'' race pipe from rx7.com and from looking at other threads they say it come with the hookup for the ports. I hope this is true but Ill see when it gets here.