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.
I would go with the Redline AND The Additive.....JMO
I agree, for confirmation, I was just at 21stCentury Muscle Car a week ago and they were changing gears out of a 427 Twin Turbo 1100HP 2004 Comm. Ed......(very nice) and they used Redline plus the GM additive. Don't think they'd mess around with THAT C5.
That sucker was pretty awesome to see......tubby slicks, skinny's up front, 427 Twin Turbo, 4" Quad B&B's shooting out the back.....much more......oh boy that was neat. sorry, got lost there for a second.