Darth Menace
Enthusiast
Hey there I was wonering what the diameter of the catback system is on a 98 GTS. After reading about the magnaflow 16992 for the GTS i see the exhaust is 3 inch diameter, but i was thinking to save money would it make sense to buy two Magnaflow glass packs and put them on the factory exhaust? Im guessing the factory exhaust is 2.5 inch vs the 3 inch magnaflow catback but I honestly dont know if the HP gain would be worth the extra cash. The magnaflow glass packs can be bought for a fraction of the magnaflow catback system. any experience on what im talking about?