The other night i installed a high flow cat (Ractive, very cheap ) and ever since then ive had a rattle towards higher rpms. The rattle comes from the cat/ header area but i cant pin point it. Its a 96 si w/ dc header and stock exhaust.

 

anybody????

 

Well if the rattle developed after the cat install, then the culprit is ____________.(Fill in the blank)

Sorry, I couldn't resist. Make sure it's not hitting a heat sheild. Those like to rattle.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by five-0 &raquo;</TD></TR><TR><TD CLASS="quote">
Make sure it's not hitting a heat sheild. Those like to rattle. </TD></TR></TABLE>

I agree.

Also, make sure that the bracket that mounts the header to the block is secure tightly and check to make sure it isn't cracked.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by AndyD &raquo;</TD></TR><TR><TD CLASS="quote">Also, make sure that the bracket that mounts the header to the block is secure tightly and check to make sure it isn't cracked.</TD></TR></TABLE>

Header is good, and i took off the heat sheilds b/c there was no holes to secure them. any other suggestions?