Just wanted to voice my opinion on these aftermarket TB's. First I purchased an MMR TB for around $400. Tried to install it and the car was f'ed. Check engine light, wrench indicator and wouldnt rev. Reinstalled the stock TB and all was fine. Sent the aftermarket TB back to MMR. They looked at it and said they adjusted it and it would definately work. Well what do you know- it didnt work. The same damn thing happened when I installed it. Called MMR again and they basically told me I'm stuck with the damn thing. What a great company that is. Then I decided to ditch the MMR TB and take a loss. I go out and buy a Granatelli TB for around $450. Well wouldnt you know this damn thing doesnt work either. I am an expert at installing these TB's now! I have installed then removed and so on and so on about 10 times now with no luck. To make a long story short dont waste your time buying these piece of s things. It's not worth the 2-6 hp you might get. Later fellas.