Quote:
Originally Posted by Schumi
After two weeks now I must say I am enjoying these headers. The ECU has compensated as much it can I believe, and I have noticed some power increase after I was able to open the car up with some open road. At high speeds the extra top end is noticeable.
The throttle response improvement is also very very welcome.
I had a CEL come on earlier in the week on a long drive- sure enough, it was a cat efficiency code. I cleared it with a code reader and it has not come back. It will eventually, though.
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Hi Schumi. You have probably read some of my older threads on these headers but let me share with you what I did to compensate for any lag you might feel in areas. I had the local muffler shop make up mid pipes out of 2" pipes for $60 and welded flanges on to mate to the headers. world of difference in the mid range. I have now installed about 4 set of header , on other cars and I actually bought the cheaper ones for $ 69 plus shipping 2 of them fit without mods the other 2 just a little adjustment to the mount holes with a dremel. I also ceramic coated one set to keep the engine bay cooler- could not tell you if it helped. Theoretically it's supposed to increase power as it evacuates the gases faster. Anyway try those 2" mid pipes I think you will like them. If you also have a cold air system then I would recommend getting DME tune to maximize the performance of all the aftermarket upgrades. I wound up with 309 FW hp from my 04 S not too bad for the money I spent and nice increase from 255.