my car makes a rattling sound when i give it gas, it seems that when i go past 4,000 rpm the rattling goes away though. the rattling is between my exaust manifold and my exaust pipe i cant tell where it is exactly though! it seems like it is between my exaust manifold and my exaust. i have a b16a1 and lsd tranny i have aslo a catback exaust and mandrell bend exaust. please help me where could this sound be coming from? any help would be appreciated!!! thanx you guys!!!

 

Sounds like heatshields. Get under there & hit 'em with your fist, see which ones are loose.

I don't know if your A-pipe is double-wall or not. That's another possibility, if there's no loose heatshields on the outside.

 

check the heat shields around the cat, i had the same problem! it always used to do it, when people where looking at you drive by!

 

I would first check to see if it's Detonation!!!!!! Dont make it do that anymore and retard your timing. What kind of vehicle???

 

mine does the same and has the shields off. someone should maybe inside the header!!

 

engrish?

 

yea, take off heatshields. i had a rock/pebble in my cat and he(muffler shop guy) took the shield off and sure enough, pebble fell out.