Did this on my Camaro SS, a few years ago and never had a problem in the winter. Can get below zero in Illinois.

Alright, I just did this in the parking lot at work in 10 minutes (yes I am bored at work ) I didn't even buy any parts, I basically unplugged both nipples on the throttlebody (be careful as there is some coolant in the lines) then I pulled the upper coolant line on the block completely off and ran the lower coolant line (on the block) and connected it to the upper fitting. The lower coolant line on the block is longer which is why I chose to keep that one. Make sure to reuse the hose clamps and you are good to go

Funny...i did this with my Camaro too....i think every Camaro in America has this done

How would you put a thermostat on the line so that once the TB is over say 50 degrees, the lines are shut off?

No offence but that might cost more than the mod is actually worth. You could probably put a valve in place to turn it on and off as you please though but valves would be needed on both sides of the throttle body so the heat transfer could be completely blocked. Just a thought.

sounds like there were a lot of f-body owners.
i was once one too........
if you are concerned about the winter, the mod takes five minutes. just get a coupler and do it
during winter, put it back, and when spring rolls around redo the mod

Creamo3 has it right, no money spent and the bottom line even has a nice bend to go right to the upper port. I did this the day i got my car and i drive it all winter long in ohio, same as every other GM car ive owned. No problems. Warm up times and cold idle will not change because the coolent flowing though the throttle body will only be as warm or cold as the engine block. It is only to keep the throttle plate from freezeing from the air passing by it. I have not experienced this ever, even when rally racing in Michigan in the dead of winter at 20 below.

I believe it may also be a emissions thing?

I think I can picture this mod now Did you guys cap off the nipples on the TB or is this not require?

Thanks.

Some have, some have not. Just personal preference.

I did this mod on my 95 GSR..... i may try this on my 05 EVO too when I have free time.

I didn't cap them and did not notice anything different

I put caps on mine just i don't want any spiders making homes in there, man i hate spiders.

all this talk about nipples... This is great, I love free mods like these!

dude, you're sick, on a car, all nipples are male