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PAI Industries Parts

PAI Industries is JAK'S Diesel's primary aftermarket line — a deep catalog of OEM-comparable replacement parts for heavy-duty and Class 8 trucks. With coverage spanning engine, driveline, cab, and chassis, PAI is the line fleets and shops reach for when they need dependable quality without OEM lead times or OEM pricing.

Browse the full PAI range below, or tell us the part number you're matching and we'll confirm the right fit. Not sure which PAI part replaces your OEM number? Use our OEM cross-reference or request a quote and we'll line it up.

Showing 24 of 324 PAI Industries Parts
681805 Detroit
Detroit
681805 Detroit
JAK'S JAKS-681805
Available · Confirm Lead Time
$696.99
EGR COOLER
Detroit DIESEL DD15
641333 Detroit Egr Cooler
A4721400175 · A4721400475
JAK'S JAKS-641333
Available · Confirm Lead Time
$1,866.99
3890-020 Detroit
Detroit
3890-020 Detroit
JAK'S JAKS-3890-020
Available · Confirm Lead Time
$29.95
123…14

Choosing the Right PAI Industries Parts

Heavy-duty diesel components must be matched to the exact engine and application. Before ordering from this collection, verify the part number, engine model, engine serial number, and any casting or calibration number shown on the original component.

Fitment information to have ready

  • OEM, dealer, casting, or interchange part number
  • Engine manufacturer, model, and engine serial number (ESN)
  • Truck year and model when the component is chassis-specific
  • Core details for remanufactured or exchange components

Need a fitment check?

Use the OEM cross-reference tool or text a clear photo of the part tag to (720) 445-6249. A JAK'S Diesel specialist can confirm the match before the part ships.

Got a Number We Don't List?

Text a photo of the part tag — a specialist crosses it and quotes you fast.

Text a Part-Tag Photo(720) 445-6249