I have a 99 cobra convertable and im looking to add a o/r h pipe to my flowmasters. What kind are the best? im looking for power and price. Also what kind of short throw shifter and underdrive pulleys do you guy think i should get? Are any of these hard to install or could i do it myself? would i need to buy anything that i dont know about? i was reading somthing about passenger side gasket for new h pipe? please help and teach me.