I have a 99 lightning with a aftermarket y pipe with no cats and a flowmaster series 50 muffler. These were on the truck when I purchased it. It was way too loud. I had a couple of glass packs installed where the catalytic converters used to be and installed some resonator tips on the ends of the exhaust. This did quieten down some. The problem I am having is when driving down the highway at 70 to 80 mph it drones really loud and drowns out the radio. Around town it is fine. Hauling butt it is fine. Anyone try any other mufflers that will make it tolerable when driving distances at that 70, 80, 90, 100mph zone? Magnaflow? Bassani? or something else.
Thanks
Dave

 

No muffler will be quiet with no cats. Ive been down that road. Buy some high flow cat midpipes or get some factory midpipes. Your not makin any more power without the cats.

 

too loud no suck thing you might be getting too old. j/k no i have bassani bx midpipes with high flow cats and bassani bx catback on my 04 and at wot it sounds like the second coming.....

 

Try an x pipe hooked to a pair of dynomax super turbos, will give u a nice performance tone without droneing bad in the cab........

 

I had a buddy put a set of Dynomax "welded Series" on his and no cats and it was pretty quiet until he nailed it. I seriuosly considered getting a set for my truck....Most all Dynomax guys around here use the welded series.

 

Thanks guys. will try the dynomax welded and a pair of high flow cats
dave

 

Let us know how they sound and if you like them, I think you will.

 

I too, have an x pipe hooked to a pair of Dynomax Superturbos, had one chamber flowmasters with cats gutted, too loud. Yep, I'm getting too old, also as well as. I'm going to change when I go long tubes though, call it reconditioning myself.