bad street cam... terrible idle should have just gotin (hehe) the type r cams you wanted in the first place... more midrange power... yes thats right... MORE midrange power from the factory type r cams... and half the cost. Toda B spec cams are a full road racing cam. If you want to float a valve go ahead and use your stock springs... why not get the toda valvetrain they designed for their cams? or use a combo of the toda springs with crower retainers (5.5 grams lightest ive seen)