yeah... your a better driver than your friend definately. 1 piece will always be better than 2 piece... im not arguing with that. and magazines are paid to endorse one product over another...

the 4-1 has a very very slight advantage over the 4-2-1 in that the exhaust has no restrictions until the collector whereas the 4-2-1 has to go into 2 pipes, then there is the collector.