ProtoCab

OK, the date is drawing nearer where I have to go and get my exhaust noise tested. I know it will fail

Is there anything I can do to quieten my existing exhaust system?

I have a dual tip Mille-Miglia muffler. Will blocking one outlet quieten the exhaust?

My87Targa

i would think if you blocked one off it would cause more noise due to more back pressure. i could be wrong though.

ProtoCab

Then, would it be quieter if I fit a bigger, single outlet muffler?

I was thinking of fitting a 18" long Magnaflow single in/out anyway.

kens911

just stick the old stock one back on if you no longer have it you can probably get a used one pretty cheap

RarlyL8

MagnaFlows are fairly loud as well. Put a stock muffler on it.

ProtoCab

My car is originally a 3.2 Carrera, running an aftermarket turbo system using a 930 muffler.

kens911

so get a stock 930 muffler you see used ones for sale all the time on here and also pelican

DonE

While my car is idling, you can have a normal conversation standing at the rear of the car. While at cruise, you can have a normal conversation in the cockpit. Under WOT, it will be loud.

I also turned the tip down slightly to keep noise from blasting straight out. Magnaflow is good, but not sure if its good enough for your problem.

ProtoCab

Thanks to all for your input. Looks like I'll have to either source a factory muffler, or stuff my Mille-Miglia with steel wool. I've heard that works well too?!?

DeWolf

I have a friend who shoved stainless steel wool up the pipe just before he went. He actually stopped down the road a little and started stuffin'. Worked a treat. Was all blown out by the next day after a few good runs

install425

Blocking one side will make it quieter, Have a dual tip as well and install a E-cutout on one side. E-cutout is a motorized valve. It's a little hard to see in this pic but it's on the ground next to the exhaust tip.

ProtoCab

Thanks. Is there an off the shelf cap for blocking tips? Something that's removable for track events?