I want to put headers and chrome sidepipes on my 71 with BBC LS5.  Thinking of chrome Hookers.

I have them on my car. Sound is mellow, not too loud. Cannot comment on performance improvements. Very easy to install, they just slip into the sidepipes.

can`t speak for the spiral turbo baffles, however , the hooker side pipes are awesome looking, but they seem to constantly have leaks whether at the heads or where the pipe meets the collector. they tend to rust too. I went thru 3 sets in three months ( Ceramic coated) because they started to rust at the twist. I finally went with the Sterling coating from jet-hot ( more MOney) and all seems good. Still leak though. if you like a REAL rumble go with the free flow mufflers from hooker. your LS5 will sound mean .Honestly, if i had to do it again I would go with chambered exhaust under the car or factory type side exhaust. The hookers sure look cool though.good luck

I have Hooker sidepipes, also with the Jet-Hot coating.  They look really good and are pretty easy to keep clean.  I put the JCL spiral baffles in them with the caps cut off.  The sound is incredible and I've gotten a ton of compliments on how great the car sounds.