HI FLOW CATS AND HEADERS
I was able to get the headers and cats welded up and fitted into the chassis. The flanges on the cats are 3" stainless three bolts from Pypes. These things are very nice, very high quality. If your looking for flanges, I highly recommend these. They are tig welded on the inside, so no welds are visible. I also welded the O2 bungs into the collectors. I will be using factory GM LS7 sensors. Next up, the existing exhaust needs to be modified to meet up with the new pipes.
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1973 Pontiac Grand Am ERL built 430 CI LS7, Brodix STS BR7 heads, Magnum T-56 6-speed, Modulare 19" wheels, QA1/Global West/Speedtech suspension, Wilwood 6/4 piston brakes. BMW Donnington Gray paint. All wrapped up in a Hurst Pontiac tribute theme.
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