Hi is that the cat restriction mod They sell.Im going decat as it didn't cause any more loudness on a 172 system.Just mote throaty,Nick is very helpful imo
Hi I'm going for the Pms
The build quality is superb and they fit perfect.I had a system on a 172 cup and it was very quiet inside with no drone.After chatting to Nick at pms,i will be getting one in a few weeks.Not cheap but a milltek or ktec is around 450...