60 Delta Flow® - 2.25 Center In / 2.25 Offset Out - Moderate SoundThe 60 series incorporates Flowmaster's Delta Flow technology to produce a mellow tone, improved power and throttle response on smaller displacement 4 and 6 cylinder vehicles. Generally suited to rear mount installations, use of larger diameter tailpipe tip will create a deeper tone that is evident both inside and outside the vehicle. Constructed of 16 gauge aluminized steel and fully MIG welded for maximum durability.