318 alminum intake?

If it’s a performance oriented build, I respectfully agree about the SP2P. Where the OP said low compression stock 318 for cruising in a third gen RR it should be as good as the performer 90 percent of the time. It could argued that a Weiand stealth would be the best for performance because of the 318 sized runners from plenum to port. But on a stock engine with no further mods and 2.45s, I wouldn’t be afraid to use the other manifolds if one were available for very cheap to free. They work well for heavy 4x4’s with tall gears and tall tires.