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Stupid ZZP DP question driven by paranoia

Exile

Exile

New member
Went thru the first ~12 pages of General Tech, didn't find my answer. I'm sure someone can answer this in 15seconds...please :)

Bought a "ZZP 3" Stainless Bolt in w/cat" on black Friday. The manifold end of the pipe is 3" but the cat-back end of the DP is 2.5" in diameter but the flange has oval bolt pass-thrus.

Would this cat-back system fit with this DP and provide optimal performance or do I need a different one with a 3" outlet???????

Blatantly obvious to anyone but me at the moment probably, lol.
 
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Exile said:
Went thru the first ~12 pages of General Tech, didn't find my answer. I'm sure someone can answer this in 15seconds...please :)

Bought a "ZZP 3" Stainless Bolt in w/cat" on black Friday. The manifold end of the pipe is 3" but the cat-back end of the DP is 2.5" in diameter but the flange has oval bolt pass-thrus.

Would this cat-back system fit with this DP and provide optimal performance or do I need a different one with a 3" outlet???????

Blatantly obvious to anyone but me at the moment probably, lol.
Click to expand...


It was on page 13 ;).

To answer your question, yes it would fit, notice how option #1 lets you add a downpipe.

The exhaust itself isn't restrictive past the the ubend area but your eliminating that w/ the downpipe. The rest flows just fine till about 300-350hp then that's when it debatable that it becomes restrictive. Most will never reach that point.

Most would just do headers and leave the rest of the exhaust alone unless they're going for a different tone

What I would do is leave the stock exhaust if your wanting a better tone just cut off the stock mufflers and replace w/ (insert brand of your choice) and have them welded on. Saves you a bunch of money and the ZZP exhaust is excessive loud... I wouldn't go that route you'll need up hating it quickly
 
REDCOMPG said:
It was on page 13 ;).

To answer your question, yes it would fit, notice how option #1 lets you add a downpipe.

The exhaust itself isn't restrictive past the the ubend area but your eliminating that w/ the downpipe. The rest flows just fine till about 300-350hp then that's when it debatable that it becomes restrictive. Most will never reach that point.

Most would just do headers and leave the rest of the exhaust alone unless they're going for a different tone

What I would do is leave the stock exhaust if your wanting a better tone just cut off the stock mufflers and replace w/ (insert brand of your choice) and have them welded on. Saves you a bunch of money and the ZZP exhaust is excessive loud... I wouldn't go that route you'll need up hating it quickly
Click to expand...
Mind is at ease, ty.

Yea I don't want ZZP mufflers, loud/rasp/drone would NOT make me happy. Just want the option of buying a complete 3" cat-back setup perhaps from Magnaflow or the like.
My resonator on my stock cat-back atm is leaking like crazy and needs to be cut out and straight piped. The flanges are prolly corroded beyond use too. I'm gonna hunt around for a set of pipes and just pair up some Borla Pros with them. Might add a res later if the sound is too much to bare.
 
231FUN said:
Replace the res with a glass pack, cutting it out and deleteing it will make it raspy.
Click to expand...
What will the glasspack do to the sound? Any suggestions where to get one, I've never looked at packs.
I like the way the Borla Pros sound on these cars. They have a pretty low volume (amount of sound put out, *like), but a nice relatively deep rumble that sounds just a notch above stock. At least in the clips i've seen.
 
A glasspack is similar to a resonator and ll kill majority of the drone.


Borla xs pro, stock resonator is what I ran for a long time and loved it.
 


Close


You need offset inlet, center outlet and stock piping is 2.25 so you really need 40357. I think when I ordered mine it was 2.5 and I just had a reducer welded on
 
REDCOMPG said:
Close


You need offset inlet, center outlet and stock piping is 2.25 so you really need 40357. I think when I ordered mine it was 2.5 and I just had a reducer welded on
Click to expand...
Aha, so close. 40357 it is, thanks.
Now just to cough up the $180.....or scower craigslist for awhile.

Do you know if the stock mufflers are welded on by chance? I'll just look tmrw, but it's 15 degrees out I ain't running out now aha.
 
Sure are.. Sawzaw is your friend. I just paid a little mom and pop shop like $10 to cut them off for me (really didn't feel like getting underneath the car just to save $10) then drove like 2 miles down the road to another exhaust shop to have the Borlas welded on.

Wickednicki is where I got mine from.
 
Yea I will probably do the same. The saw blade is prolly $10 anyways. And I definitely don't know how to weld or have a welder.
 


REDCOMPG said:
It was on page 13 ;).

To answer your question, yes it would fit, notice how option #1 lets you add a downpipe.

The exhaust itself isn't restrictive past the the ubend area but your eliminating that w/ the downpipe. The rest flows just fine till about 300-350hp then that's when it debatable that it becomes restrictive. Most will never reach that point.

Most would just do headers and leave the rest of the exhaust alone unless they're going for a different tone

What I would do is leave the stock exhaust if your wanting a better tone just cut off the stock mufflers and replace w/ (insert brand of your choice) and have them welded on. Saves you a bunch of money and the ZZP exhaust is excessive loud... I wouldn't go that route you'll need up hating it quickly
Click to expand...
So when I made this thread, I also sent out an email to ZZP. Just got a response.
The downpipe you ordered has a 2.5” exit, so you need either a 2.5” catback, a custom 2.5” inlet on a 3” catback, or to send the downpipe back in so I can put a 3” exit on it.
Click to expand...

But from what we've talked about, there's no point in me going thru the hassle of sending it back or even getting a 3" catback until ~350 whp? My intentions atm for my car are a 3.4 setup. Probably will stop there, at least for awhile.
 
if it has a flange on the end of the DP where it would bolt to the res, you'll have no problem bolting it up.


no flange you'll just need a reducer, they cost like 5 bucks at the parts store, i just installed one from my res to new main exhaust pipe.
 
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