Top Speed's Cat Back System Installation

[Ottacat]

Does anyone know how loud these are in Db? I ask because I DE my car and both tracks near me have sound check restrictions.

[happygilmour]

Read my post. The question is do I need 2 or 4? Both ends of the U pipe or just the muffler end. And no word on the Hanger mounting bolts? Don't be such a turd Slate. Ok, I'm calm again too.

[Fintro11]

Originally Posted by Nine8Six

Omg, man that sounds far better than mine :/ This mod has to be day-and-night for you. Nice vid comp

lol the one U pipe came off the clamp and was sitting a inch from the muffler :P haha

do you have the secondary cat delete ?

[happygilmour]

Ok...now I'm stumped. I installed the 2" Easy clamp from NAPA...now called 2" SafetyClamp. I can't get them tight! I've tightened them down all the way and they still float on the pipe. My pipes seem to be 1 7/8" not 2". Anyone else found this? This is the connection from the muffler to the U pipe.

[gtoger]

Unfortunately I do not have any wisdom for you on this one, as I had mine welded. I really don't like exhaust leaks...

[gtoger]

Originally Posted by Ottacat

Does anyone know how loud these are in Db? I ask because I DE my car and both tracks near me have sound check restrictions.

That's a tricky one to answer. How loud at what distance? Under what conditions? Anyone with a smartphone can get a db reading that won't be dead on, but will put you in the ballpark. But obviously the loudness at idle from 15 feet (5 meters for you Metric types) will be a lot different than 6000 rpm at the the same distance.

As a strictly non-scientific answer, they're not so loud as to generate complaints from my neighbors or my wife. I'd say generally no louder than my GMC pickup with the Duramax diesel.

[BruceH]

Originally Posted by happygilmour

Ok...now I'm stumped. I installed the 2" Easy clamp from NAPA...now called 2" SafetyClamp. I can't get them tight! I've tightened them down all the way and they still float on the pipe. My pipes seem to be 1 7/8" not 2". Anyone else found this? This is the connection from the muffler to the U pipe.

From the muffler to the U pipe, I used the OEM clamps, the easy clamp was only used for the cat bypass pipe connections in my installation. I looked at my connections and the muffler to the U pipe is definitely a smaller diameter, so yes, you would need a smaller easy clamp for that connection.

[happygilmour]

Thanks Bruce. That's what I thought. So the info in earlier posts saying you can use the 2" easy clamps on the U pipe to muffler connect is wrong. And from what I can see the smallest Easy Clamp is 2".

[Fintro11]

Originally Posted by happygilmour

Thanks Bruce. That's what I thought. So the info in earlier posts saying you can use the 2" easy clamps on the U pipe to muffler connect is wrong. And from what I can see the smallest Easy Clamp is 2".

I think you have to hammer the U pipe into the muffler a bit then clamp, I butted the U and the muffler and it keeps sliding out

[BruceH]

Originally Posted by happygilmour

Thanks Bruce. That's what I thought. So the info in earlier posts saying you can use the 2" easy clamps on the U pipe to muffler connect is wrong. And from what I can see the smallest Easy Clamp is 2".

I must have missed that post or just didn't pay attention. It takes some fiddling to get the U pipe connected to the muffler, but once you do, the OEM clamps work well for that connection.

[Fintro11]

Originally Posted by BruceH

I must have missed that post or just didn't pay attention. It takes some fiddling to get the U pipe connected to the muffler, but once you do, the OEM clamps work well for that connection.

The U part has to be pushed into the muffler pipe correct? The cat delete / u pipe is butted though?

[BruceH]

That sounds correct, but it has been a while since I did mine. You are using the step down pipe from the Cat delete pipes, right?

[Fintro11]

Yep that's not the trouble spot though it's where it hits the muffler

[Fintro11]

Fixed, cut a bit off the U pipe shoved it in the muffler and clamped tight.

[BruceH]

Glad to hear, how does it sound now?

[Slate 01]

Originally Posted by BruceH

Glad to hear, how does it sound now?

You know it sounds Kickarse now

[Fintro11]

Originally Posted by BruceH

Glad to hear, how does it sound now?

way more quiet, nice growl in the higher rpm. I think I am going to do the headers next

[clickman]

hey Martin, can you redo your before/after video now that its fixed?

[Fintro11]

Try this,

https://www.facebook.com/Martin.944/videos/1006029796088361/

[happygilmour]

Has anyone tried something like this for the drone. Early models don't have the double cats, so we can't do the cat delete or Easy Clamp.

Exhaust drone - solved