37 reviews

Thermostats

SKU: ZZ-TSTAT-180

$9.99 Sale price

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.

You are viewing a product listed on the following platform:

3800

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.

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4.9 Based on 37 Reviews
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CK
05/16/2020
Cody K.
United States United States
Best thermostat ever!

This is the best thermostat. No other thermostat is better. You found a better thermostat? Fake news. If you don't buy this thermostat, you'll have a worse thermostat. Thermostat.

DG
05/14/2020
Dalton G.
United States United States
The best one

Stays cold way better the the stock one

ZZPerformance Thermostats Review
SB
05/07/2020
Sean B.
United States United States
Works perfect

& if you wanna run just 5 degrees cooler just drill 6 3/32in holes in between the lip for the o-ring and the spring frame, it'll take only a minute or two to bleed all the air out too;-)

ZH
04/16/2020
Zach H.
United States United States
180° thermostat

Thermostat does as described and is a great addition for the anemic cooling system for the L67 setups.

GK
03/26/2020
gregg K.
United States United States
awesome

sweet, no worries!

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