I put Dynatech supermax headers and high flow cats on my 04 Silverado back in 04. Recently I've been getting o2 codes with cel. Took header off and found a few cracks where primary meets inside the flange. I feel they were a good investment. I don't even fault them for cracking after 15 years and 157,000 miles as well as a few over temps when dealing with electric fan failures.

My question is replace with same or go with something else like Kook (coated) or something better than the Ebay special?

Y pipe has been bashed a few times off roading but its holding up ok. My code is bank 2 sensor 2.

I plan to pull header and weld it but I dont know if it will survive. Hence I'm getting my research out of the way now.
Anyone have experience with both drands?

thanks

 

I replaced my Stainlessworks headers with Texas speed and they are every bit as good.

 

Contact Dynatech. They will have you ship them to them and they will weld them up. Had the same thing happen on mine but I took 'em to a buddy who welded up around the pipes as well as welded between each tube where it was close enough to keep everything moving together instead of independent flex. But really...contact Dynatech, they stand by their products. Had I not been in a pinch, they were gonna ship them back on their dime and repair them for me.