i can understand single exit on an engine with a single manifold, but if you have 2 manifolds why try and force it out of 1 pipe?
Do you actually realise how the single exhaust works? It is identical to the stock setup & 90% of other exhausts that people buy except instead of a big heavy back box you get one single pipe I still have 2 manifolds, 2 cats, a Y-pipe & a mid pipe like everybody else
Single exhausts have also been proven to flow better & are also a whole lot lighter than other aftermarket exhausts. Singles are also commonly used on FI cars in the states