Thermostats

27

ZZ-TSTAT-180 $9.99
Thermostat Model
Regular price $9.99

Cooler engine temps reduce KR and promote cooler intake air temps. Our high flow thermostats feature openings 20% larger than stock for increased flow.
A non-drilled 180 stat is recommended for the 2004+ GPs, 2000+ Bonnevilles, Monte Carlos, Impalas and Regals or an engine code can be set. If you want to run a drilled or a 160 degree thermostat you may need to run our ZZP PCM because we have the ability to delete the 0128 code and to avoid a rich condition because the coolant temps are so low. The drilled thermostat will cause the engine to take longer to warm up, this is only beneficial in a situation when your car is sitting, not running, and is started up to race before the engine gets to temperature. For example, when in the staging lanes at the race track. Plus it flows a little bit of water even when the car is not to running temperature. The thermostat is still closed, so it frees up the parasitic loss of the water pump turning without the ability to move water. Since a drilled thermostat will take longer for your engine to warm up, your gas mileage will also be reduced.


A 180 is the coldest generally recommended for the N/A 3800. Thermostat housing bolts: 21 ft/lbs

Does not fit the LS4 v8

Cooler engine temps reduce KR and promote cooler intake air temps. Our high flow thermostats feature openings 20% larger than stock for increased flow.
A non-drilled 180 stat is recommended for the 2004+ GPs, 2000+ Bonnevilles, Monte Carlos, Impalas and Regals or an engine code can be set. If you want to run a drilled or a 160 degree thermostat you may need to run our ZZP PCM because we have the ability to delete the 0128 code and to avoid a rich condition because the coolant temps are so low. The drilled thermostat will cause the engine to take longer to warm up, this is only beneficial in a situation when your car is sitting, not running, and is started up to race before the engine gets to temperature. For example, when in the staging lanes at the race track. Plus it flows a little bit of water even when the car is not to running temperature. The thermostat is still closed, so it frees up the parasitic loss of the water pump turning without the ability to move water. Since a drilled thermostat will take longer for your engine to warm up, your gas mileage will also be reduced.


A 180 is the coldest generally recommended for the N/A 3800. Thermostat housing bolts: 21 ft/lbs

Does not fit the LS4 v8

You are viewing a product listed on the following platform:

3800

Customer Reviews

4.9 Based on 27 reviews
5 ★
93% 
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4 ★
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RT
05/20/2019
Ricky T.

Thermostat

Very good keep my car cooler then the stock thermostat must have

ME
05/14/2019
Matthew E.

Works awesome, 160 thermostats are hard to get these days

I have a hypertech III programmer, which allows adjustments to be made including the addition of a 160 degree thermostat, this is a high quality part with a very large valve. I’m thrilled I found one!

DT
05/08/2019
Dante T.

180° Tstat

Had to replace the water pump and the coolant elbows on my 06 GranPrix GTP those plastic elbows from Gm are a joke I got the really durable cool looking metal ones from ZZP land I got this 180° Tstat to replace the stock 195° one keeps the car temp down by opening a little earlier. I love it .

PS
09/02/2018
Phil S.

180* thermostat, no complaints at all

Works perfectly. Extremely pleased that ZZP offers this, since I can't find a 180* or lower thermostat for the 3800 anywhere else.

TS
08/05/2018
Timothy S.

Very responsive team at zzp cant wait for pay days now!

Everything I have purchased from zzp has been very easy to install and is truely basically plug and play replacement performance parts,I cant wait to see what my Bonneville can do after a few more purchases and mods.