trialt

atm I have a stillen y pipe, full 2.5" piping w/ resonator, and a greddy evo2 muffler. since I am running the 2.62 pulley I notice that there is a LOT of extra backpressure. Im thinking about running a 4" exhaust system the headers back. any input on this idea?

matty

iTrader: (54)

I would vote, NO. 4" is overkill and just pointless.

I think your best bet is to get a Warpspeed 3" y-pipe with test pipe, and make a nice 3" mandral bent system, from the test pipe back to a quality muffler. You wont be dissapointed in the power and sound.

-matt

trialt

as long as it will be enough =)

SEmy2K2go

iTrader: (10)

Most BBC drag cars don't even run 4" exhaust.

JClaw

iTrader: (17)

Unless you have 700whp... nope. 3-inch is enough for ANY boosted maxima.

Bags

iTrader: (3)

The ONLY vehicles I have seen 4inch exhausts on make 700+ whp OR 900+ wtq (diesel trucks)

wunfstmax

iTrader: (7)

I know of at least one car that gained power going from 3 to 4in exhaust, but that was a 612whp civic. Like most said way to much for just a supercharged maxima

The Wizard

iTrader: (43)

Maybe you'll want to considering signing up for the 3"....

http://forums.maxima.org/showthread.php?t=519304

ObsidianIce69

iTrader: (11)

You definitely should get in on this

trialt

ahh I guess 3" it is. well, trying to buy a y-pipe atm and im going to get a custom mandrel bent 3" system with high flow cat and a blitz muffler

Nealoc187

iTrader: (23)

How in the world did you "notice" there is alot of backpressure? Did you install a pressure gauge in your exhaust and datalog it or what?

To reiterate what everyone else said, 4" = pointless for you.

trialt

yes I will probably go with a 3". I will just redo my stillen ypipe to 3" and change all the piping.

liqidvenom

iTrader: (6)

but chicks dig a guy with a big pipe....

Pasok86

iTrader: (17)

To reiterate what everyone else said, 4" = pointless for you.[/QUOTE]

+1

VIP Maxima

even if u were to accomplish a 4" downpipe and after, wat about your headers? dont you think they would restrict the airflow. whatever flows into the y pipe is whatever the headers can let out, no matter if u have 4" or bigger. i say invest in headers if u already havent done so.

Ziggyrama

iTrader: (1)

4" is an overkill. Even 3" is usually an overkill for a lot of FI cars. For some reason, people think they really NEED 3" exhausts. It can't hurt but usually it's not neccessary.