Skip to main content
Hi !Hi! Sign in or registerHelp & Contact
Sell
Watchlist
My eBay
  • Summary
  • Recently Viewed
  • Bids/Offers
  • Watchlist
  • Purchase History
  • Selling
  • Saved feed
  • Saved Searches
  • Saved Sellers
  • Messages
Please sign-in to view notifications.
Loading...
eBay Home
Advanced
Copyright © 1995-2025 eBay Inc. All Rights Reserved. User Agreement, Privacy, Payments Terms of Use, Cookies and AdChoice

Spectre Performance Engine Thermostats for 1978 Chevrolet K20

breadcrumb

  • eBay
    • Parts & Accessories
    • Car & Truck Parts & Accessories
    • Engine Cooling Components
  • Parts & Accessories
  • Car & Truck Parts & Accessories
  • Engine Cooling Components
  • Thermostats & Housings
  • Spectre Performance Engine Thermostats for 1978 Chevrolet K20

Shop by category

  • Engine Cooling Components
    • Thermostats & Housings
    • Caps
    • Clamps & Hardware
    • Coolant Hoses
    • Engine Oil Coolers & Lines
    • Expansion & Overflow Tanks
    • Fan & Shroud Assemblies
    • Fan Blades
    • Fan Clutches
    • Fan Motors
    • Gaskets, Seals & O-Rings
    • Other Engine Cooling Components
    • Radiators
    • Temperature Sensors
    • Water Pumps
    • Spectre 4932 Thermostat Housing Fits 1997-Later LS Engines Straight Neck Polishe - Image 1 of 2
    • Spectre 4932 Thermostat Housing Fits 1997-Later LS Engines Straight Neck Polishe - Image 2 of 2

    Spectre 4932 Thermostat Housing Fits 1997-Later LS Engines Straight Neck Polishe

    JEGS – Selection, Value, Lifetime Support Since 1960…
    Brand New · Spectre Performance
    S$ 44.75
    S$ 51.83 shipping
    3⁣G⁣ ⁣S⁣L⁣Z⁣ ⁣Y⁣0⁣p⁣ ⁣o⁣B⁣n⁣ѕ⁣o⁣r⁣e⁣S⁣d⁣ ⁣E⁣⁣B⁣ ⁣⁣R⁣⁣
    • Spectre 4930 45 Degree Water Neck, Pol Alum, O-Ring, Fits Chevy, Each - Image 1 of 4
    • Spectre 4930 45 Degree Water Neck, Pol Alum, O-Ring, Fits Chevy, Each - Image 2 of 4
    • Spectre 4930 45 Degree Water Neck, Pol Alum, O-Ring, Fits Chevy, Each - Image 3 of 4
    • Spectre 4930 45 Degree Water Neck, Pol Alum, O-Ring, Fits Chevy, Each - Image 4 of 4

    Spectre 4930 45 Degree Water Neck, Pol Alum, O-Ring, Fits Chevy, Each

    Free 30-day Returns|Expert Tech Support
    Brand New · Spectre Performance
    S$ 151.01
    Was: S$ 173.66was - S$ 173.66
    S$ 32.59 shipping
    I⁣M⁣S⁣p⁣ ⁣o⁣E⁣n⁣B⁣s⁣o⁣r⁣е⁣ ⁣d⁣D⁣U⁣ ⁣⁣Y⁣⁣⁣O⁣⁣⁣ ⁣⁣⁣
    • Spectre for Chevy V8 (Early) Water Neck - Chrome - Image 1 of 4
    • Spectre for Chevy V8 (Early) Water Neck - Chrome - Image 2 of 4
    • Spectre for Chevy V8 (Early) Water Neck - Chrome - Image 3 of 4
    • Spectre for Chevy V8 (Early) Water Neck - Chrome - Image 4 of 4

    Spectre for Chevy V8 (Early) Water Neck - Chrome

    FREE AND FAST SHIPPING. FREE RETURNS. 100% AUTHENTIC!
    Brand New · Spectre Performance
    S$ 51.49
    S$ 30.57 shipping
    S⁣3⁣N⁣ ⁣2⁣p⁣4⁣o⁣n⁣s⁣ ⁣o⁣r⁣е⁣P⁣B⁣d⁣⁣⁣ ⁣⁣A⁣⁣6⁣ ⁣⁣D⁣6⁣
    • Spectre 4933 90 Degree Water Neck, Pol Billet Aluminum, Fits Chevy, Each - Image 1 of 4
    • Spectre 4933 90 Degree Water Neck, Pol Billet Aluminum, Fits Chevy, Each - Image 2 of 4
    • Spectre 4933 90 Degree Water Neck, Pol Billet Aluminum, Fits Chevy, Each - Image 3 of 4
    • Spectre 4933 90 Degree Water Neck, Pol Billet Aluminum, Fits Chevy, Each - Image 4 of 4

    Spectre 4933 90 Degree Water Neck, Pol Billet Aluminum, Fits Chevy, Each

    Free 30-day Returns|Expert Tech Support
    Brand New · Spectre Performance
    S$ 55.94
    Was: S$ 64.34was - S$ 64.34
    S$ 49.35 shipping
    S⁣p⁣5⁣о⁣n⁣s⁣o⁣Y⁣ ⁣3⁣r⁣H⁣e⁣d⁣⁣⁣ ⁣⁣⁣⁣D⁣⁣⁣T⁣ ⁣P⁣⁣⁣
  • Spectre Chrome Plated Aluminum Thermostat Housing Water Neck 66-up Chevy SBC BBC - Image 1 of 3

    Spectre Chrome Plated Aluminum Thermostat Housing Water Neck 66-up Chevy SBC BBC

    Brand New · Spectre Performance
    S$ 18.12
    S$ 28.66 shipping
    50 sold
    R⁣Y⁣⁣⁣⁣⁣ ⁣F⁣⁣⁣⁣D⁣⁣⁣ ⁣A⁣⁣F⁣⁣⁣⁣⁣⁣⁣⁣ ⁣L⁣⁣
  • Spectre Chrome Water Outlet Neck Thermostat Housing Early SBC Small Block Chevy - Image 1 of 4

    Spectre Chrome Water Outlet Neck Thermostat Housing Early SBC Small Block Chevy

    Brand New · Spectre Performance
    S$ 20.91
    S$ 28.75 shipping
    27 watching
    0⁣3⁣ ⁣⁣Q⁣D⁣⁣ ⁣I⁣⁣⁣E⁣⁣⁣ ⁣⁣1⁣⁣1⁣⁣ ⁣Y⁣⁣⁣Y⁣⁣ ⁣⁣
  • Spectre 42313 Chrome Water Neck For Late Model Chevrolet V8 New - Image 1 of 4

    Spectre 42313 Chrome Water Neck For Late Model Chevrolet V8 New

    Brand New · Spectre Performance
    S$ 23.63
    S$ 29.74 shipping
    ⁣P⁣⁣6⁣⁣⁣⁣⁣ ⁣U⁣J⁣ ⁣⁣⁣⁣⁣I⁣⁣Y⁣ ⁣B⁣⁣W⁣⁣⁣⁣ ⁣⁣
  • Water Neck - Image 1 of 1

    Water Neck

    Brand New · Spectre Performance
    S$ 64.13
    S$ 30.02 shipping
    T⁣3⁣⁣⁣⁣ ⁣⁣K⁣⁣M⁣⁣⁣ ⁣⁣S⁣⁣⁣H⁣⁣ ⁣⁣W⁣⁣K⁣⁣ ⁣⁣⁣
  • Spectre 4232 Chrome Water Neck Thermostat Housing SB Ford SBF 289 302 351W V8 - Image 1 of 4

    Spectre 4232 Chrome Water Neck Thermostat Housing SB Ford SBF 289 302 351W V8

    New (Other) · Spectre Performance
    S$ 22.31
    S$ 29.70 shipping
    ⁣⁣I⁣⁣⁣⁣F⁣ ⁣9⁣G⁣⁣⁣ ⁣⁣D⁣D⁣ ⁣⁣W⁣5⁣ ⁣P⁣J⁣⁣⁣ ⁣⁣S⁣
  • Spectre 42313 Engine Coolant Thermostat Housing - Image 1 of 4

    Spectre 42313 Engine Coolant Thermostat Housing

    New (Other) · Spectre Performance
    S$ 16.72
    S$ 28.62 shipping
    F⁣⁣⁣E⁣ ⁣X⁣⁣G⁣⁣⁣⁣⁣ ⁣3⁣⁣D⁣⁣⁣⁣⁣⁣⁣⁣⁣⁣ ⁣⁣⁣
  • SPECTRE 4230 WATER NECK FOR CHEVY V-8 1955-1965 - Image 1 of 1

    SPECTRE 4230 WATER NECK FOR CHEVY V-8 1955-1965

    New (Other) · Spectre Performance
    S$ 6.99
    S$ 63.09 shipping
    I⁣2⁣⁣ ⁣⁣⁣⁣⁣⁣8⁣A⁣ ⁣⁣D⁣L⁣ ⁣⁣⁣⁣X⁣R⁣ ⁣⁣⁣⁣H⁣X⁣ ⁣
  • Spectre 42313 Chrome Coolant Thermostat Housing For Chevrolet SBC BBC Late Model - Image 1 of 4

    Spectre 42313 Chrome Coolant Thermostat Housing For Chevrolet SBC BBC Late Model

    Brand New · Spectre Performance
    S$ 23.77
    S$ 29.74 shipping
    U⁣H⁣⁣⁣ ⁣⁣⁣⁣⁣Q⁣⁣R⁣⁣⁣ ⁣⁣Q⁣J⁣ ⁣W⁣⁣⁣K⁣⁣ ⁣D⁣8⁣ ⁣
  • Spectre Performance 42313 Water Neck - Image 1 of 1

    Spectre Performance 42313 Water Neck

    Brand New · Spectre Performance
    S$ 30.93
    S$ 25.28 shipping
    D⁣4⁣ ⁣⁣⁣O⁣X⁣⁣⁣ ⁣5⁣H⁣ ⁣8⁣Y⁣⁣ ⁣T⁣7⁣ ⁣5⁣⁣⁣ ⁣⁣⁣⁣⁣
  • Spectre Performance 42303 Water Neck - Image 1 of 1

    Spectre Performance 42303 Water Neck

    Brand New · Spectre Performance
    S$ 51.13
    S$ 29.64 shipping
    M⁣7⁣ ⁣S⁣W⁣0⁣p⁣o⁣n⁣ ⁣ѕ⁣0⁣o⁣r⁣L⁣e⁣d⁣⁣ ⁣⁣⁣⁣2⁣⁣⁣A⁣ ⁣⁣
  • Spectre 42303 Thermostat Housing Fits 1955-65 Chevy 265-454 V8 Triple-Chrome Pla - Image 1 of 1

    Spectre 42303 Thermostat Housing Fits 1955-65 Chevy 265-454 V8 Triple-Chrome Pla

    JEGS – Selection, Value, Lifetime Support Since 1960…
    Brand New · Spectre Performance
    S$ 33.56
    S$ 52.40 shipping
    4⁣Ѕ⁣p⁣Q⁣ ⁣8⁣o⁣n⁣s⁣R⁣o⁣r⁣e⁣ ⁣O⁣d⁣⁣P⁣⁣⁣ ⁣4⁣G⁣⁣ ⁣⁣5⁣⁣
  • Spectre 42313 Thermostat Housing Fits 1965-73 Chevy V8 Triple-Chrome Plated Bolt - Image 1 of 1

    Spectre 42313 Thermostat Housing Fits 1965-73 Chevy V8 Triple-Chrome Plated Bolt

    JEGS – Selection, Value, Lifetime Support Since 1960…
    Brand New · Spectre Performance
    S$ 14.67
    S$ 51.84 shipping
    S⁣р⁣o⁣n⁣5⁣4⁣s⁣ ⁣L⁣K⁣ ⁣o⁣r⁣F⁣K⁣ ⁣e⁣8⁣d⁣V⁣ ⁣N⁣Z⁣⁣ ⁣V⁣⁣⁣
  • NEW Spectre Performance O-RING Chrome Water Necks Chevy SB Early - Image 1 of 1

    NEW Spectre Performance O-RING Chrome Water Necks Chevy SB Early

    Brand New · Spectre Performance
    S$ 19.51
    or Best Offer
    S$ 29.61 shipping
    ⁣7⁣V⁣⁣⁣ ⁣⁣W⁣⁣⁣⁣S⁣⁣⁣ ⁣⁣S⁣C⁣⁣⁣ ⁣⁣⁣⁣⁣U⁣⁣U⁣
  • Engine Coolant Thermostat Housing-CARB Spectre 42303 - Image 1 of 1

    Engine Coolant Thermostat Housing-CARB Spectre 42303

    Brand New · Spectre Performance
    S$ 49.70
    S$ 29.60 shipping
    ⁣⁣⁣⁣⁣⁣0⁣⁣⁣4⁣⁣ ⁣⁣E⁣⁣⁣⁣⁣5⁣⁣⁣⁣⁣⁣ ⁣⁣T⁣⁣
  • SPECTRE 42321 Chrome Thermostat Housing Water Outlet Neck - SBF Ford 302 351 V8 - Image 1 of 4

    SPECTRE 42321 Chrome Thermostat Housing Water Outlet Neck - SBF Ford 302 351 V8

    Brand New · Spectre Performance
    S$ 20.91
    S$ 28.75 shipping
    A⁣T⁣⁣ ⁣8⁣⁣M⁣ ⁣2⁣A⁣⁣⁣⁣⁣⁣⁣⁣ ⁣⁣A⁣T⁣⁣ ⁣S⁣C⁣ ⁣F⁣⁣
  • Spectre Performance 4232 Chrome Water Neck for Small Block Ford O-Ring Design - Image 1 of 1

    Spectre Performance 4232 Chrome Water Neck for Small Block Ford O-Ring Design

    Brand New · Spectre Performance
    S$ 27.96
    S$ 28.96 shipping
    ⁣G⁣H⁣⁣ ⁣G⁣⁣S⁣⁣ ⁣⁣⁣0⁣1⁣ ⁣⁣⁣⁣E⁣⁣Y⁣ ⁣⁣L⁣2⁣⁣⁣⁣
  • Spectre 42303 Water Neck, Chevy SEALED NEW - Image 1 of 2

    Spectre 42303 Water Neck, Chevy SEALED NEW

    Brand New · Spectre Performance
    S$ 34.96
    S$ 29.17 shipping
    ⁣0⁣⁣M⁣ ⁣⁣6⁣Q⁣⁣ ⁣⁣T⁣⁣O⁣ ⁣⁣O⁣⁣S⁣⁣⁣ ⁣0⁣⁣⁣A⁣ ⁣1⁣
  • Spectre 4737 Water Neck; Pontiac V8 - Image 1 of 3

    Spectre 4737 Water Neck; Pontiac V8

    Brand New · Spectre Performance
    S$ 32.16
    S$ 29.08 shipping
    H⁣9⁣ ⁣⁣K⁣L⁣ ⁣S⁣⁣⁣S⁣⁣⁣⁣ ⁣⁣O⁣B⁣⁣⁣ ⁣Q⁣5⁣⁣ ⁣⁣D⁣⁣
  • Spectre Performance 4933 Water Neck - Image 1 of 1

    Spectre Performance 4933 Water Neck

    Brand New · Spectre Performance
    S$ 61.12
    S$ 29.94 shipping
    ⁣⁣⁣7⁣B⁣⁣⁣⁣⁣⁣⁣⁣ ⁣2⁣⁣⁣1⁣⁣ ⁣4⁣⁣⁣F⁣⁣⁣ ⁣6⁣9⁣
  • Spectre Performance 42303 Water Neck with Hardware for Chevrolet NEW - Image 1 of 1

    Spectre Performance 42303 Water Neck with Hardware for Chevrolet NEW

    New (Other) · Spectre Performance
    S$ 7.67
    or Best Offer
    S$ 38.16 shipping
    U⁣C⁣⁣ ⁣⁣⁣⁣⁣S⁣⁣⁣D⁣⁣ ⁣⁣⁣Z⁣⁣V⁣⁣⁣ ⁣⁣⁣B⁣K⁣ ⁣D⁣
  • Spectre Performance 42303 Water Neck with Hardware for Chevrolet NEW - Image 1 of 2

    Spectre Performance 42303 Water Neck with Hardware for Chevrolet NEW

    Brand New · Spectre Performance
    S$ 11.18
    S$ 37.55 shipping
    ⁣⁣Q⁣1⁣⁣ ⁣J⁣O⁣ ⁣8⁣⁣⁣Y⁣ ⁣F⁣⁣⁣⁣⁣⁣R⁣ ⁣0⁣⁣⁣R⁣ ⁣⁣
  • Spectre 42303 Water Neck, Fits Chevy 265-427, GMC 283-347 - Image 1 of 4

    Spectre 42303 Water Neck, Fits Chevy 265-427, GMC 283-347

    Ships directly from the vendor within 2 days
    Brand New · Spectre Performance
    S$ 44.75
    Was: S$ 51.47was - S$ 51.47
    S$ 51.83 shipping
    Z⁣I⁣ ⁣⁣L⁣7⁣ ⁣4⁣⁣0⁣⁣⁣⁣ ⁣F⁣Q⁣⁣ ⁣T⁣M⁣⁣⁣ ⁣9⁣⁣⁣⁣ ⁣
  • Water Neck - Image 1 of 1

    Water Neck

    Brand New · Spectre Performance
    S$ 64.52
    S$ 44.01 shipping
    2⁣9⁣⁣⁣ ⁣Y⁣W⁣ ⁣8⁣⁣Y⁣⁣ ⁣G⁣3⁣ ⁣9⁣I⁣⁣ ⁣Z⁣⁣⁣ ⁣⁣⁣⁣⁣
  • Spectre Performance 4933 Water Neck - Image 1 of 4

    Spectre Performance 4933 Water Neck

    Brand New · Spectre Performance
    S$ 55.94
    S$ 39.64 shipping
    ⁣Q⁣L⁣ ⁣⁣I⁣2⁣⁣⁣ ⁣⁣⁣B⁣E⁣⁣ ⁣⁣⁣⁣⁣⁣⁣D⁣I⁣⁣⁣ ⁣⁣
  • Spectre for 66+ Chevy V8 Water Neck - Chrome - Image 1 of 4

    Spectre for 66+ Chevy V8 Water Neck - Chrome

    FREE AND FAST SHIPPING. FREE RETURNS. 100% AUTHENTIC!
    Brand New · Spectre Performance
    S$ 31.31
    S$ 47.31 shipping
    H⁣Ѕ⁣S⁣ ⁣K⁣Q⁣p⁣ ⁣o⁣n⁣Y⁣F⁣s⁣ ⁣V⁣0⁣o⁣r⁣ ⁣e⁣d⁣Z⁣P⁣ ⁣J⁣⁣⁣ ⁣
  • Spectre for Chevy 90 Degree Swivel Water Neck - Polished Aluminum - Image 1 of 4

    Spectre for Chevy 90 Degree Swivel Water Neck - Polished Aluminum

    FREE AND FAST SHIPPING. FREE RETURNS. 100% AUTHENTIC!
    Brand New · Spectre Performance
    S$ 61.47
    S$ 30.86 shipping
    7⁣S⁣X⁣ ⁣р⁣o⁣n⁣J⁣S⁣s⁣o⁣r⁣ ⁣e⁣G⁣T⁣d⁣ ⁣⁣⁣O⁣⁣A⁣ ⁣H⁣4⁣⁣ ⁣
  • Thermostat Housing Fits Chevy 45 Degree - Image 1 of 1

    Thermostat Housing Fits Chevy 45 Degree

    Brand New · Spectre Performance
    S$ 52.92
    S$ 39.90 shipping
    R⁣⁣⁣4⁣ ⁣⁣S⁣⁣⁣⁣⁣2⁣⁣ ⁣W⁣R⁣⁣⁣⁣ ⁣1⁣Z⁣ ⁣5⁣R⁣⁣⁣⁣
  • Thermostat Housing Fits Chevy 15 Degree - Image 1 of 1

    Thermostat Housing Fits Chevy 15 Degree

    Brand New · Spectre Performance
    S$ 29.43
    S$ 39.20 shipping
    J⁣⁣⁣Z⁣⁣ ⁣S⁣F⁣ ⁣0⁣R⁣ ⁣⁣⁣⁣E⁣P⁣ ⁣⁣7⁣⁣D⁣ ⁣⁣⁣G⁣⁣⁣
  • All Listings
  • Auction
  • Buy It Now
  • Best Match
  • Time: ending soonest
  • Time: newly listed
  • Price + Shipping: lowest first
  • Price + Shipping: highest first
  • Distance: nearest first
  • List View
  • Gallery View

32 results

Sort: Best Match

  • Best Match
  • Time: ending soonest
  • Time: newly listed
  • Price + Shipping: lowest first
  • Price + Shipping: highest first
  • Distance: nearest first
  • Brand: Spectre Performance- Selected