• arko-infographic-v2-1
  • arko-infographic-v2-2
  • arko-infographic-v2-3
1 4

Cummins 4BT 3.9L Upper Head Gasket kit with 4 Piston Ring Sets STD 102 mm

Cummins 4BT 3.9L Upper Head Gasket kit with 4 Piston Ring Sets STD 102 mm

1216-kit

$124.99
$124.99
Sale Sold out
Shipping calculated at checkout.

1-Year Manufacturer Defect Warranty — not sure if this fits? Call (818) 261-3896 and we'll confirm before you order.

Complete Top-End & Ring Bundle : OEM Matched Includes (1) Cylinder Head / Upper Gasket Set and (4) complete piston ring sets, enough for all 4 cylinders on Cummins 4BT engines. STD 102mm Piston Rings: OEM 3802421 Ring sets are Standard (STD) size, 102mm bore, designed for Cummins 3.9L 4BT engines using standard pistons. Ideal for rebuilds without cylinder overbore. Upper Gasket Set : OEM 3804896 Head gasket kit includes critical top-end sealing components required for cylinder head service, valve work, or gasket replacement on Cummins 4BT diesel engines. Fits Cummins 4BT 3.9L Applications : Compatible with Cummins 4BT 3.9L 4-Cylinder Diesel Engines, including 1989–2002 Dodge Ram 2500 & 3500 truck replacement applications using 4BT conversions or industrial setups. Fitment Verification Recommended Before Installation: Fitment depends on engine configuration and bore size. Please confirm 4BT 3.9L, STD 102mm bore, and OEM references 3802421 / 3804896 before installation. Contact us if you need help verifying.

OEM / reference numbers: 3802421, 3804896

View full details
✓
100% New OEM-Quality
Precision Manufactured
✓
30-Day Free Returns
No Questions Asked
✓
Same-Day Shipping
Orders Before 2PM PST
★
25800+ Verified Ratings
99.7% positive on eBay

OEM Cross Reference

Search by any of these part numbers — this part replaces all of them:

3802421
Primary OEM Part Number
3804896
Alternate Cross Reference
🚜

Fits These Engines

  • •102MM

Read the engine plate, not the machine badge — the same chassis ships with different engines.

Why Rebuilders Trust Arko

🎯
Built to Spec
Aftermarket replacement manufactured to the original fitment specification. Verify the reference number and it drops in.
🛠
People Who Know Parts
Call (818) 261-3896 and someone who works on these every day confirms fitment before you order.
🛡
Risk-Free Purchase
30-day free returns and a 1-year manufacturer defect warranty. If it is not the right fit, send it back.

25800+ verified ratings · 99.7% positive · Top Rated Plus on eBay. Source: eBay store feedback profile. Real seller feedback — we do not publish invented product reviews.

Get It Fitted Right

Order before 2PM PST for same-day shipping. Free returns within 30 days if it is not the right fit.

Add to Cart — $124.99