Quote:
Originally Posted by One_Quick_Z
The Howl/Whistle is what I like to call it, I had a whole write up in my journal thread about it including links to videos with it... My conclusion is that the way the X pipe is designed it cant handle the extra flow that happens when installing HFC's or Test Pipes.... Just save yourself the trouble get rid of it and go with FI or HKS and combo up TP or HFC's or get the longtube headers and you wont be dissapointed 
Here is link to my journal thread with write up.
*One_Quick_Z's Journal/Dyno/Videos/Pics*
DAN |
Thats what I decided to do. I will be putting my stock nismo exhaust up for sale and once someone picks it up Ill order FI one. Hate to do this but the noise its unbearable just like you have mentioned it in your tread. Down shifting should make me smile but it just does the complete opposite.