Downpipes - HIGHLY recommended.
11-14-2002, 06:15 AM
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Downpipes - HIGHLY recommended.
I just got my car back from the shop after I had a set of Evolution Motorsports Rencat downpipes installed. Holy cow, can I tell a big difference. My car is chipped with a Velocimax cat back and was pretty quick, but with the downpipes it is much different. Above 3000 RPM is when the butt dyno says WOW!
I chose the Evolution downpipes because they use 100 cell cats rather then the 400 cell cats - thus more flow. Anyone looking to set up their exhaust system the right way follow me. Evolution downpipes and Velocimax exhaust.
I chose the Evolution downpipes because they use 100 cell cats rather then the 400 cell cats - thus more flow. Anyone looking to set up their exhaust system the right way follow me. Evolution downpipes and Velocimax exhaust.
11-14-2002, 06:31 AM
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Down Pipes are worth every penny! but watch out for those 100cell cats come inspection time.
I run the 400cells per inch and never had a flow problem. I always run the cats even at the track.
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11-14-2002, 07:04 AM
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Are you concerned about the long-term "health" of the 100 cpi cats?
Reason I ask is that AWE Tuning has the following info on their site regarding their DP's:
<i>Why we chose a 400 cell per inch (cpi) catalytic converter: At the top of our priority list was choosing a catalyst that would do its job properly in cleaning the exhaust emissions. There are some fundamental requirements regarding a catalytic converter that will meet US Federal tailpipe emissions testing (i.e. get an emission sticker on your car). The primary requirement for LONG TERM tailpipe emissions compliance is that the converter matrix has 400 cells per inch. Anything less than this, and the converter will have trouble meeting the exhaust gas emissions requirements as mandated by US Federal standards as the catalytic converter ages with use. The exhaust gas content standards here in the US were set based upon what a a 400 cpi (minimum) catalytic converter can achieve.
Any catalytic converter that has less than 400 cpi will have trouble meeting strict long term tailpipe emissions tests.
We have extremely strict emissions testing in Pennsylvania, and we have confirmed that our downpipes meet PA tailpipe emissions standards with the cats in place. If they pass here, they will pass the tailpipe test anywhere. We can guarantee this, and this guarantee is backed by the catalytic converter manufacturer since it is EPA and DOT approved.</i><ul><li><a href="http://www.awe-tuning.com/pages/shared/part_detail.cfm?PMaI=1&PMoI=4&PEI=6&PP =s4_27t_exhaust.cfm&PPT=Exhaust&IL=AWESflo _DP">AWE-Tuning's S4 Downpipes</a></li></ul>
<i>Why we chose a 400 cell per inch (cpi) catalytic converter: At the top of our priority list was choosing a catalyst that would do its job properly in cleaning the exhaust emissions. There are some fundamental requirements regarding a catalytic converter that will meet US Federal tailpipe emissions testing (i.e. get an emission sticker on your car). The primary requirement for LONG TERM tailpipe emissions compliance is that the converter matrix has 400 cells per inch. Anything less than this, and the converter will have trouble meeting the exhaust gas emissions requirements as mandated by US Federal standards as the catalytic converter ages with use. The exhaust gas content standards here in the US were set based upon what a a 400 cpi (minimum) catalytic converter can achieve.
Any catalytic converter that has less than 400 cpi will have trouble meeting strict long term tailpipe emissions tests.
We have extremely strict emissions testing in Pennsylvania, and we have confirmed that our downpipes meet PA tailpipe emissions standards with the cats in place. If they pass here, they will pass the tailpipe test anywhere. We can guarantee this, and this guarantee is backed by the catalytic converter manufacturer since it is EPA and DOT approved.</i><ul><li><a href="http://www.awe-tuning.com/pages/shared/part_detail.cfm?PMaI=1&PMoI=4&PEI=6&PP =s4_27t_exhaust.cfm&PPT=Exhaust&IL=AWESflo _DP">AWE-Tuning's S4 Downpipes</a></li></ul>