Neighbor Hater or Screaming Wife mufflers.
 

I'm looking for some loud radical sounding mufflers for our 79 TransAm. Stepping up to 3in from 2, 1/2 in with H pipe into Flowmaster Delta 40,s and then dumps. I've got Headmen 1, 3/4 in primaries into 3 in collectors. I also use a 12 inch collector extension 3in off the collector 2 ,1/2 in exit.
I plan on useing 3inch pipe from the collectors to 3inch H pipe to 3inch mufflers and dumps before the rear end. Is there a performance issue having 3 inch exhaust pipe coming off the header collector straight to the mufflers. I'll be replacing the old 1, 3/4 by 3 inch headers with 1, 7/8 inch hedders with 3, 1/2 inch collectors later. Engine is a Jim Moran build. 1974, 0.60 400 cu /467 cu stroker. Ohio 4.25 forged crank, Eagle forged rods, with Icon forged pistons. Kauffman 87 cc D-ports, 310 cfm heads. Holley Street Dominator intake, with a spacer and 750 Holley carb. As anyone here tried either mufflers mentioned in the title above? Any idea how they are flow wise. I've heard a few sound clips. They are LOUD. I'm over 60 yrs old and half deaf anyways, so loud isn't a problem for me. Any info on exhaust pipe sizing or if you're using Neighbor Hater or the slightly quieter Screaming Wife mufflers is appreciated.

Loud and Radical is from the engine and going to 3" all you need to do is get a straight through mufflers and you should be quite happy. The 3" is quite a bit louder than the 2.5" and if going from cambered muffler to ta straight through success! Violator Muffler 14 Inch Body 3 Inch Offset Inlet/Offset Outlet 409 Stainless MVV16 or MagnaFlow 4 X 9in. Oval Straight-Through Performance Exhaust Muffler 11229. take your pick
Jim

We'll have some nasty 3" spin techs we can sell one of these days soon. These typically are very annoying.