[Yonco]

well, i hope not, sounds great, the first 30 seconds of running it will pop when the rpm's decrese cause its cold, but besides that, and im sure its restricted enough to avoid valve problems, as its a full exhaust, a set of longtubes with cutouts would serve a chunk of less , and i even have highflow cats. Anways, I belive the SLP Loudmouths are just a set of pipes that replace the mufflers( so ive heard) and ive only heard of burnt valves from running a car with to big of primarys on a set fo headers or someone messing around running it w/ no headers. but a full exhaust w/ cats should be enough. -Jon