High Performance Thermostats

A thermostat sits between the engine and the radiator. Its works by blocking the flow of coolant to your radiator until the engine has warmed up. When your engine is cold, no coolant flows through the engine. Once your engine reaches around 200 degrees F, the thermostat will open and allow coolant to begin flowing. A high performance engine runs much hotter than those from the factory. The high pressure and stress throughout your system could easily be too much for a factory thermostat to handle. A high performance thermostat will handle the high temperatures, and allow the proper flow of coolant through your system to keep your engine safe. While shopping our large inventory you will find a wide selection of 160 degree, 180 degree, and 195 degree thermostats. We also carry a selection of OE replacement thermostats. If you have any questions about thermostats for your 1970 Chevrolet Chevelle, reach out to one of our experienced representatives and we will help you make a more informative decision.

Any liquid cooled engine requires a means of controlling the rate of flow through the cooling system, for optimum temperature control. The thermostat restricts coolant flow to the radiator until the engine reaches operating temperature, and then regulates flow to maintain that temperature. But high compression and forced induction performance and racing engines that are revved to maximum RPM generate much more heat than ordinary engines, creating demands that a standard thermostat can’t handle.

The coolant flow rate through a high performance engine is critical to optimal heat transfer. Coolant that flows too slowly stays in the engine too long, increasing engine temperature. The coolant may even boil away in some areas, creating hot spots that can cause serious damage. A standard thermostat may not allow sufficient flow for optimal heat dissipation in the radiator, and most standard thermostats can’t function properly at high RPM when the engine has been modified with a high flow water pump.

Performance thermostats are structured to provide increased coolant flow when open compared to standard thermostats. Many are of the balanced design, which equalize the water pressure on both sides of the thermostat to prevent being forced close from increased coolant flow, a condition that can occur with a standard thermostat when the engine is abruptly revved. Performance thermostats are also much more accurate than standard thermostats, and usually open within a few degrees of their rated temperature. Their sensing elements are also typically more sensitive than standard thermostats, enabling them to respond faster to coolant temperature change.

The flow characteristics, accuracy and prompt opening of a performance thermostat will allow your engine to deliver the power it’s capable of and last longer. Engines operate most efficiently and undergo the least wear when engine temperature is maintained within a relatively narrow range. This is especially true of computer controlled electronic fuel injected engines. Enabling the engine to quickly get to that range and stay within its limits results in optimal fuel atomization and the proper air/fuel mixture for thorough combustion and maximum power, along with minimal cylinder wear and oil usage. Our performance thermostat will meet the needs of your high horsepower, high RPM engine.

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DERALE 15719
Please Note:

Some images might not represent the actual product

DERALE 15719 Fluid Control Thermostat Kit
for 1970 Chevrolet Chevelle

$74.28

Save: $9.69
Sale Price:

$64.59

Estimated Ship Date: Today

In Stock - 16 New In Stock
TrimEngineFit NotesFitment Notes

ALL

 
1970 Chevrolet Chevelle equipped with
L,
7.4L V8,
6.6L V8,
6.5L V8,
5.7L V8,
5.0L V8,
4.1L L6
 
Engine Coolant Thermostat Kit
13/16-16"
 
1970 Chevrolet Chevelle equipped with
L,
7.4L V8,
6.6L V8,
6.5L V8,
5.7L V8,
5.0L V8,
4.1L L6 Engine Coolant Thermostat Kit
13/16-16"
,
MR GASKET 9142G
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MR GASKET 9142G O-Ring Style Water Neck 90Deg Swivel
for 1970 Chevrolet Chevelle

$70.98

Save: $9.26
Sale Price:

$61.72

Estimated Ship Date: Today

In Stock - 6 New In Stock
TrimEngineFit NotesFitment Notes

ALL

 
1970 Chevrolet Chevelle equipped with
7.4L V8,
6.6L V8,
6.5L V8,
5.7L V8,
5.0L V8
 
Engine Coolant Thermostat Housing
Chromed Aluminum
90 deg. Bend
Swivel
 
1970 Chevrolet Chevelle equipped with
7.4L V8,
6.6L V8,
6.5L V8,
5.7L V8,
5.0L V8 Engine Coolant Thermostat Housing
Chromed Aluminum
90 deg. Bend
Swivel
,
MR GASKET 9141G
Please Note:

Some images might not represent the actual product

MR GASKET 9141G O-Ring Style Water Neck 45Deg Swivel
for 1970 Chevrolet Chevelle

$69.91

Save: $9.12
Sale Price:

$60.79

Estimated Ship Date: Today

In Stock - 1 New In Stock
TrimEngineFit NotesFitment Notes

ALL

 
1970 Chevrolet Chevelle equipped with
7.4L V8,
6.6L V8,
6.5L V8,
5.7L V8,
5.0L V8
 
Engine Coolant Thermostat Housing
Chromed Aluminum
45 deg. Bend
Swivel
 
1970 Chevrolet Chevelle equipped with
7.4L V8,
6.6L V8,
6.5L V8,
5.7L V8,
5.0L V8 Engine Coolant Thermostat Housing
Chromed Aluminum
45 deg. Bend
Swivel
,
MR GASKET 738G
Please Note:

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MR GASKET 738G Water Outlet Gasket Packaged w/ Aluminum Carrier
for 1970 Chevrolet Chevelle

$36.44

Save: $4.75
Sale Price:

$31.69

Estimated Ship Date: Today

In Stock - 13 New In Stock
TrimEngineFit NotesFitment Notes

ALL

 
1970 Chevrolet Chevelle equipped with
6.6L V8,
6.5L V8,
5.7L V8,
5.0L V8
 
Engine Coolant Thermostat Housing Gasket
Aluminum Carrier-Molded Rubber Insert
w/Molded Silicone Bead
 
1970 Chevrolet Chevelle equipped with
6.6L V8,
6.5L V8,
5.7L V8,
5.0L V8 Engine Coolant Thermostat Housing Gasket
Aluminum Carrier-Molded Rubber Insert
w/Molded Silicone Bead
,
MISHIMOTO MMTS-WRA-87L
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MISHIMOTO MMTS-WRA-87L Racing Thermostat 82 C / 180 F
for 1970 Chevrolet Chevelle

$34.65

Save: $4.52
Sale Price:

$30.13

Estimated Ship Date: Today

In Stock - 7 New In Stock
TrimEngineFit NotesFitment Notes

Base

 
1970 Chevrolet Chevelle equipped with
L
 
Engine Coolant Thermostat
 
1970 Chevrolet Chevelle equipped with
L Engine Coolant Thermostat

Concours

 
1970 Chevrolet Chevelle equipped with
L
 
Engine Coolant Thermostat
 
1970 Chevrolet Chevelle equipped with
L Engine Coolant Thermostat

Concours Estate

 
1970 Chevrolet Chevelle equipped with
L
 
Engine Coolant Thermostat
 
1970 Chevrolet Chevelle equipped with
L Engine Coolant Thermostat

Greenbrier

 
1970 Chevrolet Chevelle equipped with
L
 
Engine Coolant Thermostat
 
1970 Chevrolet Chevelle equipped with
L Engine Coolant Thermostat

Malibu

 
1970 Chevrolet Chevelle equipped with
L
 
Engine Coolant Thermostat
 
1970 Chevrolet Chevelle equipped with
L Engine Coolant Thermostat

Nomad

 
1970 Chevrolet Chevelle equipped with
L
 
Engine Coolant Thermostat
 
1970 Chevrolet Chevelle equipped with
L Engine Coolant Thermostat

SS

 
1970 Chevrolet Chevelle equipped with
L
 
Engine Coolant Thermostat
 
1970 Chevrolet Chevelle equipped with
L Engine Coolant Thermostat
,
MR GASKET 4364
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MR GASKET 4364 High Performance Thermostat 180deg F
for 1970 Chevrolet Chevelle

$31.22

Save: $4.07
Sale Price:

$27.15

Estimated Ship Date: Today

In Stock - 96 New In Stock
TrimEngineFit NotesFitment Notes

ALL

 
1970 Chevrolet Chevelle equipped with
L
 
Engine Coolant Thermostat
180 deg.
Race Only
 
1970 Chevrolet Chevelle equipped with
L Engine Coolant Thermostat
180 deg.
Race Only
,
PROFORM 141-501
Please Note:

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PROFORM 141-501 Engine Coolant Thermostat Housing
for 1970 Chevrolet Chevelle

$31.14

Save: $4.06
Sale Price:

$27.08

Estimated Ship Date: Today

In Stock - 3 New In Stock
TrimEngineFit NotesFitment Notes

Concours

 
1970 Chevrolet Chevelle equipped with
5.0L V8 Naturally Aspirated
 
Water Neck
Chrome
O-Ring Style
15 Degree Type
 
1970 Chevrolet Chevelle equipped with
5.0L V8 Naturally Aspirated Water Neck
Chrome
O-Ring Style
15 Degree Type

Concours Estate

 
1970 Chevrolet Chevelle equipped with
5.0L V8 Naturally Aspirated
 
Water Neck
Chrome
O-Ring Style
15 Degree Type
 
1970 Chevrolet Chevelle equipped with
5.0L V8 Naturally Aspirated Water Neck
Chrome
O-Ring Style
15 Degree Type

Greenbrier

 
1970 Chevrolet Chevelle equipped with
5.0L V8 Naturally Aspirated
 
Water Neck
Chrome
O-Ring Style
15 Degree Type
 
1970 Chevrolet Chevelle equipped with
5.0L V8 Naturally Aspirated Water Neck
Chrome
O-Ring Style
15 Degree Type

Malibu

 
1970 Chevrolet Chevelle equipped with
5.0L V8 Naturally Aspirated
 
Water Neck
Chrome
O-Ring Style
15 Degree Type
 
1970 Chevrolet Chevelle equipped with
5.0L V8 Naturally Aspirated Water Neck
Chrome
O-Ring Style
15 Degree Type

Nomad

 
1970 Chevrolet Chevelle equipped with
5.0L V8 Naturally Aspirated
 
Water Neck
Chrome
O-Ring Style
15 Degree Type
 
1970 Chevrolet Chevelle equipped with
5.0L V8 Naturally Aspirated Water Neck
Chrome
O-Ring Style
15 Degree Type
,
MR GASKET 2557
Please Note:

Some images might not represent the actual product

MR GASKET 2557 O-Ring Style Water Neck Incorporates 1/2in NPT Vacuum Switch Hole
for 1970 Chevrolet Chevelle

$30.72

Save: $4.01
Sale Price:

$26.71

Estimated Ship Date: Today

In Stock - 2 New In Stock
TrimEngineFit NotesFitment Notes

ALL

 
1970 Chevrolet Chevelle equipped with
7.4L V8,
6.6L V8,
6.5L V8,
5.7L V8,
5.0L V8
 
Engine Coolant Thermostat Housing
w/Bolts And O-Ring
0.5 in. Vacuum Switch Hole
Check To Insure Correct Fit
 
1970 Chevrolet Chevelle equipped with
7.4L V8,
6.6L V8,
6.5L V8,
5.7L V8,
5.0L V8 Engine Coolant Thermostat Housing
w/Bolts And O-Ring
0.5 in. Vacuum Switch Hole
Check To Insure Correct Fit
,
MR GASKET 4363
Please Note:

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MR GASKET 4363 High Performance Thermostat 160deg F
for 1970 Chevrolet Chevelle

$30.44

Save: $3.97
Sale Price:

$26.47

Estimated Ship Date: Today

In Stock - 61 New In Stock
TrimEngineFit NotesFitment Notes

ALL

 
1970 Chevrolet Chevelle equipped with
L
 
Engine Coolant Thermostat
160 deg.
Race Only
 
1970 Chevrolet Chevelle equipped with
L Engine Coolant Thermostat
160 deg.
Race Only
,
MR GASKET 4365
Please Note:

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MR GASKET 4365 High Performance Thermostat 195deg F
for 1970 Chevrolet Chevelle

$30.44

Save: $3.97
Sale Price:

$26.47

Estimated Ship Date: Today

In Stock - 9 New In Stock
TrimEngineFit NotesFitment Notes

ALL

 
1970 Chevrolet Chevelle equipped with
L
 
Engine Coolant Thermostat
195 deg.
Race Only
 
1970 Chevrolet Chevelle equipped with
L Engine Coolant Thermostat
195 deg.
Race Only
,
MR GASKET 9845
Please Note:

Some images might not represent the actual product

MR GASKET 9845 O-Ring Style Water Neck
for 1970 Chevrolet Chevelle

$30.29

Save: $3.95
Sale Price:

$26.34

Estimated Ship Date: Today

In Stock - 6 New In Stock
TrimEngineFit NotesFitment Notes

ALL

 
1970 Chevrolet Chevelle equipped with
7.4L V8,
6.6L V8,
6.5L V8,
5.7L V8,
5.0L V8
 
Engine Coolant Thermostat Housing
w/Bolts And O-Ring
Straight Neck
 
1970 Chevrolet Chevelle equipped with
7.4L V8,
6.6L V8,
6.5L V8,
5.7L V8,
5.0L V8 Engine Coolant Thermostat Housing
w/Bolts And O-Ring
Straight Neck
,
MR GASKET 2661
Please Note:

Some images might not represent the actual product

MR GASKET 2661 O-Ring Style Water Neck
for 1970 Chevrolet Chevelle

$28.19

Save: $3.68
Sale Price:

$24.51

Estimated Ship Date: Today

In Stock - 20 New In Stock
TrimEngineFit NotesFitment Notes

ALL

 
1970 Chevrolet Chevelle equipped with
7.4L V8,
6.6L V8,
6.5L V8,
5.7L V8,
5.0L V8
 
Engine Coolant Thermostat Housing
w/Bolts And O-Ring
Check To Insure Correct Fit
 
1970 Chevrolet Chevelle equipped with
7.4L V8,
6.6L V8,
6.5L V8,
5.7L V8,
5.0L V8 Engine Coolant Thermostat Housing
w/Bolts And O-Ring
Check To Insure Correct Fit
,
Speed Fx 8455
Please Note:

Some images might not represent the actual product

Speed Fx 8455 Engine Coolant Thermostat Housing
for 1970 Chevrolet Chevelle

$26.69

Save: $3.48
Sale Price:

$23.21

Estimated Ship Date: Today

In Stock - 2 New In Stock
TrimEngineFitment Notes

ALL

 
1970 Chevrolet Chevelle equipped with
L
 
1970 Chevrolet Chevelle equipped with
L
,
SCE GASKETS 1108-10
Please Note:

Some images might not represent the actual product

SCE Gaskets 1108-10 Engine Coolant Thermostat Housing
for 1970 Chevrolet Chevelle

$15.18

Save: $1.98
Sale Price:

$13.20

Estimated Ship Date: Today

In Stock - 2 New In Stock
TrimEngineFit NotesFitment Notes

BASE

 
1970 Chevrolet Chevelle equipped with
7.4L V8 Gas OHV,
6.6L V8 Gas OHV,
6.6L V8 Gas
 
 
1970 Chevrolet Chevelle equipped with
7.4L V8 Gas OHV,
6.6L V8 Gas OHV,
6.6L V8 Gas

CONCOURS

 
1970 Chevrolet Chevelle equipped with
7.4L V8 Gas OHV,
6.6L V8 Gas OHV,
6.6L V8 Gas
 
 
1970 Chevrolet Chevelle equipped with
7.4L V8 Gas OHV,
6.6L V8 Gas OHV,
6.6L V8 Gas

CONCOURS ESTATE

 
1970 Chevrolet Chevelle equipped with
7.4L V8 Gas OHV,
6.6L V8 Gas OHV,
6.6L V8 Gas
 
 
1970 Chevrolet Chevelle equipped with
7.4L V8 Gas OHV,
6.6L V8 Gas OHV,
6.6L V8 Gas

GREENBRIER

 
1970 Chevrolet Chevelle equipped with
7.4L V8 Gas OHV,
6.6L V8 Gas OHV,
6.6L V8 Gas
 
 
1970 Chevrolet Chevelle equipped with
7.4L V8 Gas OHV,
6.6L V8 Gas OHV,
6.6L V8 Gas

MALIBU

 
1970 Chevrolet Chevelle equipped with
7.4L V8 Gas OHV,
7.4L V8 Gas,
6.6L V8 Gas OHV,
6.6L V8 Gas,
6.5L V8 Gas
 
 
1970 Chevrolet Chevelle equipped with
7.4L V8 Gas OHV,
7.4L V8 Gas,
6.6L V8 Gas OHV,
6.6L V8 Gas,
6.5L V8 Gas

NOMAD

 
1970 Chevrolet Chevelle equipped with
7.4L V8 Gas OHV,
6.6L V8 Gas OHV,
6.6L V8 Gas
 
Wagon 4-Door
 
1970 Chevrolet Chevelle equipped with
7.4L V8 Gas OHV,
6.6L V8 Gas OHV,
6.6L V8 Gas Wagon 4-Door

SS

 
1970 Chevrolet Chevelle equipped with
7.4L V8 Gas OHV,
6.6L V8 Gas OHV,
6.5L V8 Gas
 
 
1970 Chevrolet Chevelle equipped with
7.4L V8 Gas OHV,
6.6L V8 Gas OHV,
6.5L V8 Gas
,
MR GASKET 740
Please Note:

Some images might not represent the actual product

MR GASKET 740 Thermostat Gasket
for 1970 Chevrolet Chevelle

$7.89

Save: $1.03
Sale Price:

$6.86

Estimated Ship Date: Today

In Stock - 15 New In Stock
TrimEngineFit NotesFitment Notes

ALL

 
1970 Chevrolet Chevelle equipped with
7.4L V8,
6.6L V8,
6.5L V8,
5.7L V8,
5.0L V8
 
Engine Coolant Thermostat Housing Gasket
Bulk
 
1970 Chevrolet Chevelle equipped with
7.4L V8,
6.6L V8,
6.5L V8,
5.7L V8,
5.0L V8 Engine Coolant Thermostat Housing Gasket
Bulk
,
COMETIC C5538-047
Please Note:

Some images might not represent the actual product

COMETIC C5538-047 Fiber Thermostat Housing Gasket For 2 Bolt Thermostat Housing/Water Outlet Gasket
for 1970 Chevrolet Chevelle

$4.40

Save: $0.57
Sale Price:

$3.83

Estimated Ship Date: Today

In Stock - 56 New In Stock
TrimEngineFit NotesFitment Notes

Base

 
1970 Chevrolet Chevelle equipped with
L
 
Engine Coolant Thermostat Gasket
 
1970 Chevrolet Chevelle equipped with
L Engine Coolant Thermostat Gasket

Concours

 
1970 Chevrolet Chevelle equipped with
L
 
Engine Coolant Thermostat Gasket
 
1970 Chevrolet Chevelle equipped with
L Engine Coolant Thermostat Gasket

Concours Estate

 
1970 Chevrolet Chevelle equipped with
L
 
Engine Coolant Thermostat Gasket
 
1970 Chevrolet Chevelle equipped with
L Engine Coolant Thermostat Gasket

Greenbrier

 
1970 Chevrolet Chevelle equipped with
L
 
Engine Coolant Thermostat Gasket
 
1970 Chevrolet Chevelle equipped with
L Engine Coolant Thermostat Gasket

Malibu

 
1970 Chevrolet Chevelle equipped with
L
 
Engine Coolant Thermostat Gasket
 
1970 Chevrolet Chevelle equipped with
L Engine Coolant Thermostat Gasket

Nomad

 
1970 Chevrolet Chevelle equipped with
L
 
Engine Coolant Thermostat Gasket
 
1970 Chevrolet Chevelle equipped with
L Engine Coolant Thermostat Gasket

SS

 
1970 Chevrolet Chevelle equipped with
L
 
Engine Coolant Thermostat Gasket
 
1970 Chevrolet Chevelle equipped with
L Engine Coolant Thermostat Gasket