I thought the quality was great on the headers themselves, but after installing a set of Kooks on my step brothers GTO, I could definitely see where some of the price difference was. Kooks came with these nice o2 extensions with molded connectors where Pacesetter sent me a spool of wire and butt connectors. Also, they came with regular $2 muffler clamps instead of the nice band clamps Though it made it a bit more of a pain in the ***, it was definitely worth the trouble considering the price difference between the two brands.

Incidently, these headers picked my car up from an 8.17 @ 83mph to a 7.68 @ 89mph in the 1/8th mile over the stock manifolds. They were good for .1 in the 60' alone!

 

After the headers are installed does there need to be a tune done?

 

absolutely. It's like eating pancakes without the syrup. (You need the syrup to complete it)

Since your gonna be down there, i would change the spark plugs and wires if they require changing.

 

A tune is not a critical part of doing headers, although it might provide a small gain. If you have the AIR and EGR systems removed, then a tune would be more of a necessity.