Anyone had this happen with their KOOKS headers?

[trukk]

Originally Posted by The Tony Show

Me too. I was thinking it might be defective mufflers, but a I did a quick Youtube search of brand new Corsa systems on Mustangs, Vs and more, and all have that same faint "clatter" on decel. The headers make it worse.

UPS tracking shows the Magnaflows arriving tomorrow, so hopefully I'll have them installed tomorrow night or Thursday- then we'll know if it's the canisters for sure. If not, my expensive scavenger hunt for this noise will continue.

It's definately the canisters. We should be able to get them replaced by Corsa. As long as you are the original purchaser, they have a lifetime guarantee on their systems.

-Chris

[The Tony Show]

I know, but what's the point of getting canisters that are noisy with headers replaced with identical canisters that make noise with headers? RangerRob's video is a brand new Corsa system, and it rattles. I don't think ours are defective, it's just the RSC baffles make crappy noises with headers.

This is just my opinion, but the fact that every Corsa I've heard in person has that raspy clatter on decel doesn't make me too hopeful that replacements will fix anything.

[NormV]

I got two hours logged of 6K rpms plus road course driving this weekend on stock, used gaskets without a whisper of leakage.


Norm

Originally Posted by A1beshouri

Well the other night I was showing a honda civic whats what, and i step on it in 2nd at about 35 mph, about half a second later i hear CRACK and then click click click click click click....Turns out A piece of my gasket blew apart so it was flapping around in the header making the click sound. The dealerships performance guy is putting a new gasket in from kooks tom but I wanted to know if this happened to anyone else

[rangerrob]

Originally Posted by The Tony Show

I know, but what's the point of getting canisters that are noisy with headers replaced with identical canisters that make noise with headers? RangerRob's video is a brand new Corsa system, and it rattles. I don't think ours are defective, it's just the RSC baffles make crappy noises with headers.

This is just my opinion, but the fact that every Corsa I've heard in person has that raspy clatter on decel doesn't make me too hopeful that replacements will fix anything.

Actually, the exhaust has been on the car since it was sold to the 1st owner in 2005. The headers are brand new. I took the video a few days after the headers were put on. It only had 15k miles on it last year, i doubled that number up within a year of owning the car. I'm still waiting for Corsa to call me back, I'd hate to have to go through warranty, but then again, maybe i'd get an entirely new corsa catback??? it'd be nice to get a fix asap

[The Tony Show]

Corsa is being very generous in working with me to fix the noise- I'm sending them my receipt for the catback and they're sending a new center resonator (I had cracked welds that I repaired, but they suspect that's still the problem). I'll try replacing the resonator first, and if that doesn't work then we'll move on to the mufflers. If all else fails, I've got the Magnaflow mufflers as a last resort.

Will update.

[trukk]

Originally Posted by The Tony Show

Corsa is being very generous in working with me to fix the noise- I'm sending them my receipt for the catback and they're sending a new center resonator (I had cracked welds that I repaired, but they suspect that's still the problem). I'll try replacing the resonator first, and if that doesn't work then we'll move on to the mufflers. If all else fails, I've got the Magnaflow mufflers as a last resort.

Will update.

FYI, I've had 2 resonators. Problem did not change when I installed the 2nd one, it was still there. It's in the cans.

-Chris

[The Tony Show]

I suspected the same thing, and plan on verifying it tonight. I'm going to strap a PC microphone hooked up to my laptop under the car near the resonator and record a few runs, then move it near the cans and repeat. If the noise is louder near the cans, I'll request mufflers first.

Thanks for keeping active in this thread and providing feedback, Chris.

[trukk]

Originally Posted by The Tony Show

I suspected the same thing, and plan on verifying it tonight. I'm going to strap a PC microphone hooked up to my laptop under the car near the resonator and record a few runs, then move it near the cans and repeat. If the noise is louder near the cans, I'll request mufflers first.

Thanks for keeping active in this thread and providing feedback, Chris.

Werd.

The Corsa system is great, it sounds awesome, and has zippy drone, which is worth the cost. If we can only lick the 'rattle' it will be damn near perfect

I almost wrapped a bunch of 'muffler-weld' tape around my cans, so they wouldn't resonate with the vibration, but I couldn't bring myself to it.

-Chris

[Albertan]

Gee, that sound clip sounded a lot like my son's Cavalier when he spun a rod bearing. I think I'll keep my stock exhaust.

[The Tony Show]

Let's not get carried away here, Albertan. The Corsas sound awesome, there's just an annoying rattle on decel.

[rangerrob]

Originally Posted by Albertan

Gee, that sound clip sounded a lot like my son's Cavalier when he spun a rod bearing. I think I'll keep my stock exhaust.

i'll bite my tongue on that one....

[The Tony Show]

I got the car up on a lift last night and listened while someone revved the engine- there's a definitely lot of clatter coming from the canisters, but I hear it at the resonators too. While I know it's possible for the sound to carry from the resonator and be heard coming out the mufflers, I don't think noise from the muffler could travel upstream and be heard in the resonator, so it's possible that my resonator is bad (remember that I had broken welds that I fixed).

I'll let Corsa send me the resonator first, then try the canisters. I'm wishing right now that I hadn't welded everything together, as this would be a hell of a lot easier if I could just unhook some clamps and take off parts until the noise goes away. Would either of you guys (Chris or Rob) be willing to try taking off your mufflers and seeing what happens? It's just two Torca clamps.

[rangerrob]

I would if I had a jack, tools, and a garage... i'm SOL, i'll try to take a look under it when if I'm sober this weekend and try to unclamp them and see if its coming solely from the resonators... the bday is today and i'm getting plastered!

[The Tony Show]

Have fun getting plastered!

There's not much to undoing the mufflers- just two rubber hangers that you can twist off using a screwdriver as leverage and a Torca clamp. If mine weren't welded together I'd just unhook the mufflers to see if it goes away, but that's obviously a little difficult now.

[SkullV]

Speaking of getting plastered...When are you coming through Indiana to go to little 5?