Just wanted to share my comparison of these two kits. 15882 is the axle back assembly and 15881 is the axle back + mandrel bent pipes to your stock Hpipe.
The 15882 kit will give your car a nice, deep tone. Louder than stock, but not extremely loud. I really liked it. Hp gain...none that I could FEEL.
15881 kit....gives your car a deep tone, and you can feel a rumble in the exhaust system. Very nice, very 'muscle carish.' You CAN FEEL a Seat of the Pants difference in power above 3500 RPMs. The car feels a good bit quicker and louder. You may have to have an exhaust shop install it though because getting out that over the axle pipe is a real PITA, unless you can get your car 2.5-3' off the ground.
I bought both kits from Sourappleperf.com
The 15882 kit will give your car a nice, deep tone. Louder than stock, but not extremely loud. I really liked it. Hp gain...none that I could FEEL.
15881 kit....gives your car a deep tone, and you can feel a rumble in the exhaust system. Very nice, very 'muscle carish.' You CAN FEEL a Seat of the Pants difference in power above 3500 RPMs. The car feels a good bit quicker and louder. You may have to have an exhaust shop install it though because getting out that over the axle pipe is a real PITA, unless you can get your car 2.5-3' off the ground.
I bought both kits from Sourappleperf.com