I've looked on LS1Tech and here and didn't see much about them. I am contemplating trying something on my truck. I really like the sound of my open cutout, but with the long tubes and aftermarket magnaflow cats, it is way freakin loud, much louder than my crew cab was with the same setup but stock cats.

I was looking at the dynatech cone inserts, and they claim to lower exhaust noise levels by about 2 decibles. How much is 2 decibles, I just want to slightly quiet up my exhaust, but not so much that it sounds like my exhaust thru the muffler. I am thinking about trying one, and fabbing it up to an exhaust flange so that it would still be easily removable, but not fall out on its own.

 

Rifle gun fire is about 120DB, a jackhammer is about 90DB, you decide whether its worth it or not.

 

Is that a 30-06 or a 7.62 rifle fire?

2db? Barely a difference. Like 1 click up on your stereo volume.

 

depends on how many clicks ya got..

 

My pioneer has 32 so I guess it would be like 4 clicks

 

It may sound strange, but a gain of 3 dB is considered to be twice as loud.

It's hard to grasp the decibel system.

If you can afford the inserts , try them out. your truck will not be quiet.

I was looking into them too, but the $ was too high and I had never heard of anyone trying them.

BTW, I used to go to SPL comps with the old truck. 143.7 db was my best!

 

143 is pretty good btw.

if I remember correctly I think it's twice as loud for every decible? i'll look at my old physics book later maybe

 

on my camaro i have LT's and no cats and true duals. with 2 bullet mufflers. and it was way to loud. my 6 year old son and i couldnt even talk in the car.
i order t2 dynatech turndowns with the cones in them and now my car is alot quiter. i mena we can talk in the car now. i didnt feel any loss of power and wide open throttle she is still a fire breathing monster. (loud) lol
i hope this helps. Larry

 

here is the ones i got. but i got them cheaper from dynatech directly.

http://store.summitracing.com/partde...5&autoview=sku

 

Larry, I haven't seen those before, just the ones you put into your collectors.

Thanks for the info.

Mcmastercarr part # 9255T631 (?can't link?)
16 Ga. 1/8" round hole perforated steel 36" x 40" for $67.xx

I was going to fab up some of my own with this stuff.
Enough material for several inserts.