jturkel

When deleting the secondary cats and them with pipes (i want to use SS), what diameters pipe should I replace it with? i know my resonator was replaced with a 3'. Also, what length in piping would I need to replace them both?

Thanks,

Josh

jturkel

any ideas?

TemjinX2

i think the c32 piping was 2.75''. Wouldnt you lose too much backpressure with 3'' piping?

jturkel

from what i remember from what Vadim has said in the past, backpressure isnt an issue for the c32s.

rockjock

I wouldnt be too concerned with the BP on the 32's either-2.75" is correct-as for length-ummmm.....is a shop doing it/weld in, or are you flanging everything for easy swap/emissions inspection?

Lenin

I just completed this mod a month ago. I used 2 1/2" SS 304 pipe into the stock Y-pipe. Then more of the same pipe into 2 3/4" Supersprint exhaust.
I got the pipes from these guys. Super fast shipping.
http://www.verociousmotorsports.com/...s-Steel-Tubing
I'm also confirming that that at the resonator location, the piping is 2 3/4".

jturkel

yes a shop will do it. it will pass emissions without secondaries, and they havent done a visual inspection on my car in the past, so i'm not worried about that.

ok. so if MY resonator was replaced with 3", do I need 2 1/2" to 3" so I can connect to the Y-pipe up front (2 1/2") and the pipe replacing the resonator (3") in back?

Lenin

Sounds like it. I recommend you talk to the people that will be doing the job and let them measure everything, figure out how they can connect everything and then tell you what parts and the sizes you will need. This is not engine work where you need to be exact. There are a few different ways to connect these pipes.

jturkel

hmm ok

SilverBulletAMG

2.5" is what I used. I wouldn't go more than 2.75" personally.

willc55

Out of curiousity, how much, on average, does an exhaust shop charge to chop the secondary cats? I'm thinking about doing this and a res delete at the same time, and wanted to know what I should be paying.

jturkel

well i think i have to have 3" somewhere because that is what i replaced my resonator with. i think the pipe going into the secondaries is 2 1/2" which is why i think i need to have a 2 1/2" to 3", no?

my resonator delete cost me 50 in labor and 30 for the pipe (it was a 3" SS pipe that was like 2 or 3 ft long)

rockjock

tech. a shop shouldnt be taking the cats out-so they may play dumb if you ask-after hours-depends on the pipe again, but some would give you a "what if" # if it was in the air.

Lenin

What I was trying to say earlier is that some shops may put one pipe over the over and then weld it. And other shops may butt one to the other and weld it. Does your pipe that replaced the resonator goes over the pipe that goes to your muffler? From what I recall, the muffler is 2 3/4".

These are secondary cats. What purpose do they serve?

SilverBulletAMG

I guess mine is 2.75" all around, not 2.5" as I previously stated. I started to doubt myself after my previous post and asked the guy that did the work for me.
He said you have several options for joining the 2.75" to 3" pipes and should have no drawbacks from it. Any reason they replaced yours with 3" pipes in the first place?

jturkel

b/c i brought them a 3" SS pipe lol. i thought that was the size i needed. and i think someone recommended it to me, though i dont remember for sure

c32used

How much possible weight savings there? can you post a sound clip once done if not too loud and annoying I will follow suit

jturkel

not sure, maybe a couple of lbs...maybe....from what i have read, it is for a slightly louder exhaust sound, which i would like. i will post clips after i get it done.

SilverBulletAMG

I've already done it and have clips on youtube. Pretty sure you had commented on the sound in the past even. The soundclip I posted is old but it does it justice. I can't post a link from work but can tonight if you want.

Gramma_Benz

Is this the one?

http://www.youtube.com/watch?v=ROtgZfeDZNs

SilverBulletAMG

Can't tell from my work PC but it's a 15 second clip (all my camera would record at the time) and was when my car was badged 55 from the previous owner. If that's the one in the link, then that's mine, whic is a pretty old clip....

Gramma_Benz

Yup, that's the one!

SilverBulletAMG

Cool, thanks for posting that GB.

jturkel

ok.....blast from the past....i'm bringing this back.

i think i'm going to do it this time.

anyone think about upgrading the y-pipe? i know supersprint makes one for the C32.

Lenin

I considered it since I also have a Supersprint muffler, but given the cost, decided to keep the original y-pipe. Basically, its the Eurocharged header, primary cats, new pipe, original y-pipe, new pipe followed by Superspint muffler.