I have dual sk side drafts on my d16a1. Engine starts fine, revs up to 6 grand just fine. Runs great. But sticks at 5,000 RPM. It takes about 30 seconds to a minute for it to come back down to a decent idle. It also back fires quite a bit while idling.. I was going to replace the sk with new webers, but might give it a shot with these first. It has pacesetter headers, but other than that is stock.. Thanks..