Are pacesetter headers any good? Do they even add horsepower? Are there any problems i should know before i buy? Is there another brand i should get? im looking in the 200-350 range.

I got a 08 LS

 

I have a 05 Sunfire with the pacesetter 4into1 Ceramic coated..I have had no issues..When you install the new header get a new exhaust gasket from gm..saves the risk of a leak.On my own car I changed out the motor mounts because there was lots of play in them..Which can cause cracking of the header..You could also install a flex pipe between the headder and cat if you dont want to swap out mounts..You will get some extra power up closer to the top end..Also you should do a cat back exhaust to help with flow..Some people say a 4-2-1 Set up will give you better tourqe,Where a 4into1 will give you better top end..With our cars you wont notice very much loss in tourqe..