I have done some searches and found some info but want some clarification. From what i read the stock LT1 has 52mm Throttle body. I have CAI, Headers, lt4 cam, and cat. Can I tell the size of the throttle body without taking it off? The guy i bought the car from had a bunch of mods done but not sure if he had a new throttle body or had it ported for a bigger one. just looking for some help to determine what I have and what would help performance. Can i put a bigger throttle body on knowing that I am going to get it ported to a matching size at some point? Thanks for any help you can give.

 

Wrong section for LT Qs. This is the one for LS Qs. I'll move it.

 

The stock LT1 TB is 48mm. Measure the diameter of your butterflies to determine.