The ER and BMS CPs use the factory mounting which IMO is far superior to the silicone coupler style that is used on the ETS pipe. It is also much more expensive to make the pipe with the OEM style connection so that is the reason they are more.
The ER N55 CP starts at 245.00 or so, so its not much more expensive then the ETS.
MARCH MADNESS - CLICK HERE For ALL CRAZY SALES
N54 Catless Downpipes - 329.00 Shipped!! ar design downpipes 15% OFF (including Free Ship) Evolution Racewerks FMIC, DP and Oil Coolers @ 15% OFF + FREE SHIP - WAGNER FMIC and DOWNPIPES - PM FOR INFO!