Hey guys, im new to this forum and just picked up my first Volvo. A 2001 S60 T5 5speed. As typical me (and im sure with alot others lol) I have been doing a lot of research into upgrades. Along with many other things I want to put an R style exhaust manifold on but i have a couple questions as i dont know everything about cars. Can I change the manifold just by going under the hood? would I need to adjust my downpipe and if so should I just buy the OBX DP and modify it all at once?