Kooks Headers Ticking

[racingmason]

I have about 200 miles on my 7/8 catted Kooks Long Tube Headers. I went back and rechecked all the bolts and they are all torqued properly. I have noticed under load with the windows down I hear a buffing noise similar to having only one window down in a 4 door car and it is coming from under the car. It's really pronounced when I am next to a concrete barrier or trees along the road. It only appears when the car is under load. Also, when I get on the car a wide open around 3000 rpm it sounds deafening at around the doors when passing other cars. I've checked every clamp and made sure the Borla exhaust and x pipe are lined up correctly. I originally thought it was rasp but it is at a different pitch than the exhaust out the quad tip borla.

Hoping to god the comtech header flange gaskets aren't bad.

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[CEHollier]

Sounds like an exhaust leak.

 

[racingmason]

Sounds like an exhaust leak.

The only thing I can think is leaking are the factory clamps that come off the stock cats/manifolds to the factory resonator. I think I'll pull the exhaust tomorrow and replace those clamps with a stainless coupling and band clamps.

 

[CEHollier]

The only thing I can think is leaking are the factory clamps that come off the stock cats/manifolds to the factory resonator. I think I'll pull the exhaust tomorrow and replace those clamps with a stainless coupling and band clamps.

I have seen vehicles with a cracked exhaust manifold. That ticked significantly.

 

[Chad11491]

Spray soapy water on the collector, where it meets the catback, and at the heads. Let it idle and if you see bubbling there’s your leak.

 

[beefcake]

cracked manifold is pretty rare, i would go through and retighten all the bolts

 

[racingmason]

cracked manifold is pretty rare, i would go through and retighten all the bolts

Use a shop vac to pressurize the exhaust and check for leaks. I saw a tiny leak at the kooks mid pipe and one between the x pipe and the rear pipes. Sounds better but I need a new band clamp to replace one that was stretched out and wouldn't tighten down.

 

[stevnoof]

This what my xpipe sounded like when it was leaking bad where it connects to header

 

[racingmason]

This what my xpipe sounded like when it was leaking bad where it connects to header

That's where I thought the issue would be but it wasn't. The clamp used on there is meant for butt joints and it works very well.

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