b18 headers

http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=7918859952&fromMakeTrack=true

would this be good to fit my civic with a b18a
thanks

also what are the pros and cons of 4-1 and 4-2-1. thansk guys any imput helps

4-1 makes its power more in the upper rpm's. as in like 6-10k rpms. the 4-2-1 will make more of its power between 4 and 8k rpms.

That will work. But you notice the O2 bung is down near the cat. You will have to lengthen your o2 sensor to reach.

does it change performance if the sensor is changed place.

and do they come stock with headers.

position of the o2 bung wont affect performance. the o2 sensor will not come with the header, but the whole will be on any header you buy.