So is it significantly louder with no cats compared to a high flow set? I have the challenge which has 2 resonators and 2 hfcs with the primaries removed. At first I thought it was loud but now don't even notice and it seems stockish to me. Have considered full catless but unsure if its worth the hastle at this point as I've gained most of the power available from the exhaust.
02 Tiag e46 M3|6MT|GC plates|MCS c.o.|GC bars|GC race control arms|GC bushings & bearings|BW eng. & tran. mounts|subframe kit|BW race shifter|BW Jaffster|Euro header|BW race|K&N c.a.i.|Epic race tune|Rouge race pulleys|Seibon CF hood|CSL bumper|ST-40|SR34|SS lines|half cage|Recaro profi|Profi 2 harness|BMWpedals|Apex studs|