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The 670CFM TBI kit is $395. BUT you have to buy the $200 chip AND you will need a bigger manifold b/c the stock just doesn't flow well. I figure by the time I do all that I'm up to around $800. Their Multi port system flows 750 CFM (same throttle body as their TBI unit but w/out the injectors it flows 750 instead of 670)and does cost $1150. The only additional part you need is a fuel pump which, according to the guy I talked to, is the same pump that GM used on the early 90's Camaro. The GM p/n for that pump is 2511G163. I appreciate your input. Causes me to go back and double check. In my opinion the extra $300 bucks to get the multiport over the TBI is well worth it. /forums/images/graemlins/k5.gif
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The $395 is for the throttle body itself, no kit of any kind. In addition to the $200 chip you mentioned you would also need the harness, computer, sensors etc. which are items included in the $1200 kit.
After rereading your post I think the price you got is for the components it would take to convert your pre-existing TBI system (you said you had a 90 K5) to their multi-port set up. If you were to outright purchase their multi-port kit for a carb'd vehicle I bet it would be a lot more.