340 exhaust manifold vs stock 318

Aj I like the comment about duals making a big difference
( and not having the crossover heating the oil and tranny)
but how about crossover or x pipe?
We were one of the first to run an xpipe on our trans am Javelin
made the car sound different
we caught the competition peeking under the car
the actual noise change came from a 427 roller cammed motor and the pipes were a red herring
worked on our Ford and Dodge competition...
THANKS SMOKEY for the hints on being competitive and getting away with it...
oh and with those headers- most have way too short (and to big) collectors)