Louder whistle sounds good.

[psyco66]

Today I pulled the air box in the center of the engine off of the truck. The box that has 6.6 on it. When I removed the air box I put a plug in the hole. The plug is two peaces of metal with a peace of rubber inbetween it and a bolt with a wing nut on it. The hole is two inches wide. I put the plug in and I tightened the wing nut. For added security I put a 5/16 lock not onto of the wing nut so it will not back off. I then reinstalled the air box cover thing. The turbo whistle is way louder when I let of the fuel pedal. Hope this helps you guys that want a louder whistle. If anyone needs pics let me know I can get some. It is realy easy. Went to the hadware store and bought the plug for 3.60 and it took all of about 5 mins put put in. If you go to the hardware store look in the plumbing section for the plug like I described.

[BigRedChevy]

Does it look like this?

[psyco66]

Yes it does. I forgot to take a pic with the airbox back on the truck.




Once the airbox thing is back on the truck you can not ever tell you put the plug in there.

I would put a lock nut on to keep the wing nut from backing off

[duramaxin14]

It also does help a little with quicker spooling. If u wanna here what it sound like review this vidoe at the end of the pull

YouTube - Kurt's Duramax

And this

YouTube - 2wd again

Hahaha and you would no these would be my 2 suckest pulls that u can acutally here it

[Diggin' Doug's Duramax]

What size plug is that ? Any other benefits with this?

[BigRedChevy]

It is a 2" Test plug

[psyco66]

Yes it is a 2 inch plug. I noticed it does spool a little quicker and the turbo sound way sicker when you let of the pedal. I think it is worth the 4 dollers and like 5 mins to put on. JMO.

[BigBlue'06]

Will this work on my "06 LLY?

[psyco66]

Yes it will.

[sdrllc1]

stupid question time,why is that hole there in the first place and can i do this on my lmm?? thanks.