do either of these at least add 3-4 hp?
http://cgi.ebay.com/ebaymotors/ws/eBayISAP...&category=33557
http://cgi.ebay.com/ebaymotors/ws/eBayISAP...&category=33597
http://cgi.ebay.com/ebaymotors/ws/eBayISAP...&category=33557
http://cgi.ebay.com/ebaymotors/ws/eBayISAP...&category=33597