<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>Originally posted by ACR Joe:
The low speed surging and a/f ratio mapping issues are a function of rear O2 sensors' inputs that tell the ECU if the cats are working properly. If you leave the cats on, you won't have a problem. If you remove the cats, then the Apex Snakebox solution will be necessary.
The front O2 sensors' locations are critical. The sensors needs to operate at a certain temp. which cannot be achieved if the sensors are located in the header collector. I understand that Belanger has relocated the sensors' bungs upstream into one of the primary tubes to negate this problem. Obtain assurance that this is indeed the case and that this provides an affirmative solution.
As far as sound, quality, fit and finish, and performance are concerned, the system is excellent. RWHP gain with the full blown system; I would guess ~ 40.
<HR></BLOCKQUOTE> Do you think high flow cats are needed?