OK im wondering why the SDs have a different turbo sound when they let off it? the turbo makes that sound??? Im my obs even at high boost it dosnt make that sound but i have heard some obs trucks make that sound but not very many. I cant really describe the sound its just the turbo winding down.

 

They have a different turbo first off...

But seriously... it's the .84 housing compared to our 1.15

 

oh i see, so what makes that sound?

 

The smaller housing...

 

My automatic obs does it. Its a combination of the exhaust and intake. When I get chipped I expect it to be louder.