Hi guys & Girls I mostly use my Hilux for playing off road which includes a lot of dune charging. It is however also used for Camping roadtrips, but I never drive faster than 140kms (87 miles) per hour. My original exhaust was 50mm from headers into a 2 in one out muffler then 63mm with small muffler that split into two 63mm pipes out the back. It was a crush bent mild steel system. When this system needed replacement my friend at the local exhaust shop convinced me to let him built me a dual system. His mild steel, crush bent, Dual system was 2x 50mm from headers that went up to 57mm through a 2 in 2 out muffler and then 63mm through a 2 in 2 out muffler and 63mm out the back. This system was way too quiet for my liking and which lead to me making my next impulsive mistake. I stopped by our local Powerflow Fitment centre and replaced the fist 2 in 2 out muffler with with 2 seperate 57mm powerflow mufflers. This improved the sound and made me wonder whether I should not change to a Y system with more torque, using the powerflow mufflers. If I cut up my current system I can easily and quite cheaply build a system with 2x 50mm tubing that Y into a single 63mm tube and then Y into 2x 63mm tubing out the back. But what do I do with my 2 brand new 57mm Powerflow mufflers? Can I put them behind the second Y?