What was the General's reasoning for designing such a strange piece? Was it strictly the cost factor?John Youngblood said:Has anyone opened up the hole in their 02 + H pipe to get rid of the exhaust jingle? What was the effect.
Sorry, John. I was replying to someone else's post.John Youngblood said:I'm not talking about an X pipe, I talking about using an 01 Z H-pipe (the one with the larger hole opening), and my stock cats. I have an old H pipe off of my previous 01 Z. I was wondering about the sound (resonence). Thanks, John
I agree with Charlie.NYCHASM said:What I meant to say above was this:
Why was the H-pipe designed with such a small opening rather than using the entire inside diameter of the crossover piece?
Thank you John. Thanks to you I learned something new today. :thumb:John Youngblood said:No apology needed, I know very few folks, if any, have actually used an 01 h pipe on an 02, since everyone that changes them seems to go with an x pipe. In answer to your questions, however, it is my understanding that GM reduced the size of the h pipe hole on the 02 + years because the removal of the pup cats (which were on the 01's) caused too much cabin noise. Therefore they "tuned" out the noise by reducing the size of the h pipe hole. The 01 h pipe has a 2.5" hole and the 02+ has a 1/2 inch hole. Hope this helps.