Weiand Stealth Air Strike Small Block Chevy Vortec #8502

  

Older Weiand Stealth Air Strike for a vortec SBC, #8502. Bought this in about 2010, but it's been in storage since 2019. It's got about 30k miles on it. Port openings have opened slightly, runners blended, and the plenum divider was radiused.

Some stains and cosmetic pitting on the mounting flanges. This manifold came off my 383 stroker that made 458hp + 478ft/lbs when we dynoed it at Westech on their Superflow 903. Combo was tested with a 650cfm holley carb and 1? A 750 carb, 1 ¾ headers and bigger cam would have netted closer to 500hp. Only pulled the manifold because I decided to go port injected.

This exact manifold is no longer in production. The Stealth Air Strike made more power in independent testing than the Edelbrock RPM Air Gap due to better plenum design and improved runner consistency from the permanent mold casting process. Holley/Weiand still makes the #8502, but they changed the name to Speed Warrior in 2011 and added a stupid warrior helmet logo to it.

Recent versions are also thinner/lighter and have some casting issues.