I got mine at Summit (Right around the corner in Sparks, NV) in November '05. Think I spent about $280 for Summit Headers (Blackjacks), Hooker Dual Exhaust (Fitted Pipes and clamps) & Summit Turbo Muffs - Loops over the rear axle and curves out behind the tire.. Took about 4 easy hours to install.
So far I like them on my 80 K10. Sounds good, runs good. Just watch the passenger side exhaust tube over the T/C crossmember. Mine got the header collector outlet and tube at about 11º off. Went with "Header Buddy's" - no leaks and allowed for the mis-alignment.
- Dave
SUM-G9006 - Summit branded headers (Blackjack)
HOK-16521HKR - Hooker Competition Header-Back Exhaust Systems 2 1/4
SUM-630122 - Summit Performance Turbo Mufflers