Keep proper pressure on your coolant, replaces any modern blue or black cooling cap
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
Brand:
ES#:
4691207
Mfg#:
420121321
In Stock
ON SALE!
SAVE 14%
$34.99
This product was last offered at the strikethrough price on 05-02-2026
Connects the expansion tank to the water tube and radiator
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms Up to production date 4/9/2012
Brand:
ES#:
450267
Mfg#:
8K0121081AE
Ships in 2 Business Days
9% off MSRP
MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.
$198.99
This product was last offered at the strikethrough price on 06-06-2026
Keep proper pressure in your coolant system
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms We Price Match - Give Us A Call or Chat!
Connects the expansion tank to the hard water pipes and the small upper radiator port
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms From production date 4/9/2012
Brand:
ES#:
2556704
Mfg#:
8K0121081BK
Ships in 2 Business Days
8% off MSRP
MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.
$219.99
This product was last offered at the strikethrough price on 06-06-2026
Keep proper pressure on your coolant, replaces any modern blue or black cooling cap
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Brand:
ES#:
2149010
Mfg#:
420121321
Ships in 2 Business Days
9% off MSRP
MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.
$326.99
This product was last offered at the strikethrough price on 06-06-2026
Keep proper pressure in your coolant system
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
Brand:
ES#:
4858532
Mfg#:
2Q0121321A
In Stock
ON SALE!
SAVE 22%
$19.99
This product was last offered at the strikethrough price on 05-02-2026
A common source of overheating problems is a broken or leaking coolant expansion tank. Replace it with an OEM coolant expansion tank or quality aftermarket expansion tank to prevent future woes.
Lifetime Replacement
