[lizBox]

you should consider replacing the tubes yourself. I followed pedro's instructions and did all 6 in about a 1.5 hours. read thru this link and see what's involved

http://www.pedrosgarage.com/Site%203/Change%20Spark%20Plugs%20%26%20Tubes.html

Suncoast is a decent place to get the tubes and o-rings

http://e-partssales.com/Merchant2/merchant.mvc?Screen=PROD&Store_Code=P&Product_Code=99610532552W99970734340W99970721540&Category_Code=ENGMECH