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We will be closed June 27th, 2026 - July 6th, 2026. In store pickups will be unavailable during this time. A majority of orders will ship out normally but may experience a delay in handling time. if you have any questions, please use our live chat before placing an order.
We will be closed June 27th, 2026 - July 6th, 2026. In store pickups will be unavailable during this time. A majority of orders will ship out normally but may experience a delay in handling time. if you have any questions, please use our live chat before placing an order.

Cooling System

Cooling System

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$50.00 - $50.00
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$50.00 - $50.00
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Smashed Performance 21301 Coolant Black Off Plate

Smashed Performance
10+ in stock

Put the Smashed Performance Coolant Plate in your GM 6.6L Duramax to permanently eliminate coolant leaks from the rear housing on your Duramax engi...

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$50.00 - $50.00
$50.00
$50.00 - $50.00
$50.00
$59.72 - $59.72
$59.72
$59.72 - $59.72
$59.72

Merchant Automotive 10089 Billet Coolant Block-Off Plate

Merchant Automotive
Only 2 left!

Get the Merchant Automotive 10089 Billet Coolant Block-Off Plate from GAP for your 2001-2025 GM 6.6L Duramax LB7/LLY/LBZ/LMM/LML/L5P. Merchant Auto...

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$59.72 - $59.72
$59.72
$59.72 - $59.72
$59.72
$55.00 - $55.00
$55.00
$55.00 - $55.00
$55.00

Fleece Performance FPE-DMAX-CBOP Duramax Billet Coolant Block Off Plate

Fleece Performance
10+ in stock

2001-2025 Duramax Billet Coolant Block Off Plate (Replaces GM P/N: 97941204) OE covers are prone to leakage as the gaskets dry out and factory cast...

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$55.00 - $55.00
$55.00
$55.00 - $55.00
$55.00