Y pipes,

snowsurfer · Post by **snowsurfer** » Tue Mar 23, 2004 12:27 pm

Any sugestions on where to get larger Y pipe's for my 03 SC crew?

AZS10Crew · Post by **AZS10Crew** » Tue Mar 23, 2004 12:44 pm

Probably custom made is all you can get. I don't know of anyone that makes a Y-pipe for our trucks.

Post by **HenryJ** » Tue Mar 23, 2004 1:27 pm

Could a SLP Y-pipe work?

snowsurfer · Post by **snowsurfer** » Tue Mar 23, 2004 2:40 pm

For some reason they don't list for a 03', just earlier years?

snowsurfer · Post by **snowsurfer** » Wed Mar 24, 2004 11:38 am

Recieved e mail from SLP, they don't make one for 03', oh well!!

killian96ss · Post by **killian96ss** » Wed Mar 24, 2004 1:44 pm

Flowmaster makes high flow universal Y pipes, but I'm not sure if they make it in the 2.25" size which is what I think we have.

snowsurfer · Post by **snowsurfer** » Thu Mar 25, 2004 11:14 am

Couldn't find it listed under flow either for 03' Crews

Post by **HenryJ** » Thu Mar 25, 2004 11:41 am

Is it possible that they do not list one due to the pre-cat in our Y-pipe?

Removal of the pre-cat would affect the emissions system, and perhaps be illegal for them to do?

snowsurfer · Post by **snowsurfer** » Thu Mar 25, 2004 2:37 pm

I didn't think getting a larger Y pipe would necessary mean getting rid of the pre cat. I don't believe the SLP Y pipe for the earilier models get rid of the pre cat, basically it replace the exsisting stock Y, just a larger size and even flow bends that bolts up to the exsisting collector...
I'm really not sure to be honest, I have a Powerdyne SC and want to just increase the exhaust flow with out going to headers and already have an aft cat Flow 2.5" exhaust so installing a larger Y was the next best thing I guess...

AZS10Crew · Post by **AZS10Crew** » Thu Mar 25, 2004 4:39 pm

The problem I think is that the pre-cat is downstream of the collector and in the y-pipe, so replacing the y-pipe means replacing the pre-cat, which is an emissions no-no.

Post by **HenryJ** » Thu Jun 17, 2004 3:38 pm

I've done a little more looking at the stock y-pipe.

It is not really such a bad one. the head pipes are 1.9" od (1.75" id?) mandrel bent and make a pretty smooth transition to 2.5" pipe.

I am positive that removal of the pre-cat has helped matters.

I removed my pre-cat after it plugged, and have not thrown a code, so I am confident that it would still satisfy the emission testing standards.

I had the opportunity to check the y-pipe on a '96 S-10 2wd. It is significantly smaller diameter, and makes a pretty harsh transition.

Now if you install headers, building a 2" y-pipe may have benefits, but "All-in-all" , I think that our Y-pipe is not too bad, and there may not be any gains in replacing it.

I'd say if you need a little more performance and you are not worried that you will have to pass an undercarriage visual inspection...ditch the pre-cat and stick with the stock y-pipe.

S-10CREWCAB.NET

Y pipes,

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