I know this post is about the hhr fan. But here is a pick of my big block abody. i am useing a 27.5x19 inch 2 core summit rad. a summit/cvr electric water pump and a fan that was made for a 98 ford turs(spelling). which for my car worked better than the hhr because the one i am useing the motor is off set.I could of made the hhr fan work on my car. but for me it was easer to use the ford one. sorry not trying to high jack the post just letting you guys know there might be a nother opption out there. all so my car temp has not gotton over 180 degrees yet on to back to back passes. thanks Mopar65