www.sms-products.com
http://www.theoldone.com/components/...ng_headers.htm
http://www.importpowerhouse.com/cust..._manifolds.htm

dave at sms has a few different header's available for the b series ranging from $600 to $1150. hytech's new production header is ~$800 and his custom header is $1300. his twin loop exhaust with cat is $900. another company i would recommend is RMF. he may not have the name recognition like smsp or hytech, but he makes some seriously killer headers.

take a look at this recent header test featuring all of the big dogs: http://oddballmedia.com/news/2005/Ho...t/article.html

as for exhausts, you can piece together your own. just make sure everything from the cat all the way to the muffler is 2.5" so there are no bottlenecks. www.kteller.com for piping kits.

install is something you can do in your driveway with basic handtools.