When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
you should be able to run 600rwhp with those if done right.
The Detroits used a few different sizes, but in design are very similar to an S400. Look for the A/R # stamped in the exhaust housing and measure the comp inducer( small side of the intake wheel) in mm for a better comparison.