4.2L which exhaust system

Hey, guys.

after over 1 year without a V8 I recently bought another one. since I have not dealt with the topic sports exhaust systems on v8 so far I ask for your help. if I see the right there is probably a pretty good system from bn pipe. but which of the two is more recommended the variant with endpot only left, or the variant with the exit left/right? ==References== alternative from other manufacturers?