brian tell your friend the sound will be different!!! the srt-6 has the easy exhaust!! straight out the back. the area were the slk32 muffler is is roughly 12" x12" its a very compact area. with the res and sec. cat delete the exhust note on mine was ricer loud with a prominent drone at 2000rpm(approx 60 mph) i went with the ansa and heavily modded it to get it to fit with out 6" of tips sticking out the back. results were dismal... obnoxious loud and hits the suspension resulting in a constant vibration!!! took it off and reinstalled the amg muffler with a magnaflow x pipe in place of the h pipe.
ahhhh refined aorund town quiet when it needs and roars when stepped on hard!!!! the drone is all but gone , a small bit around 70mph but im loving it!!!
tried to get a true dual in but no muffler and a 5" opening between the suspension and trunk area killed the idea!

good luck!

added note.. i feel the power i did gain was from the sec. cat delete. the resonator is a flow thru and doesnt really restrict