Does anyone else have this issue?
I had my HFC for 3 months now and every time I accelerate after I start the car, I hear this light rattle noise... I know for fact its not the axle back. When it gets warm it goes away but when I hit the gas hard I could here it again... I will try to record the reving video but it wont be a good quality sound.
BTW this is not loud infamous exhaust rattle sound, its a light rattle as if theres something inside clicking... Thats the best way I can explain right now... I will update soon as I can with video.

JY

 

did you check out black betty's thread is it what he was haveing for an issue?

 

whattype of HFC's do you have?

 

i dont have tanabe braces so i dont think its that...
i have stillens

 

someone else on here had issues with their stillens and was not getting good customer service from them . Give me a few I will find the post.

 

Could lose bolt make rattle noise?

 

ya i could I say you need to get under your car and take alook

 

i know exaclty what the problem is....

2 things.

1 the cross brace under the middle of the car is hitting the exhaust ever so lightly...take it off you wont hear it anymore, then put it back on bc that brace helps the structure of car, but SHIM it down with some washers....

2. the next noise is from the flex pipes rattling so fast....cant get rid of that at all...annoying...


on the first part, it will most likely look like its not rubbing but trust me it is...

 

^^ I will look into that thanks.

 

my boy had the same thing, ima tell him to subscribe this thead.

 

man i have the same thing, let me know what u find and if there is a fix...i hear a "pinging" noise everytime I accelerate over 3500 rpms

 

Lexy, heres the problem.

HFCS allows more flow for your exhaust system. so your HFCS will sound a bit Raspy when your throttle is opened. ( especially when the exhaust is cold, thats why when your car is warmed it goes a way a bit.) the Raspiness is completely normal. just means your car is flowing good .

you hear it the most when your driving along a divider or quiet street too. dont worry about it. and if you thnk thats loud rasp?.. take a listen on test pipes

 

^^ Thanks for the inputs

JY

 

Solution?

 

i said the solution already...it rattle on the cross member..shim it down with a couple washers...

i been under my car a million times...i know thats it..i took mine out and voila no noise...and it has spots from where it was rubbing...my car is noise free now