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  • DODGE CUMMINS
  • FORD POWERSTROKE
  • GM DURAMAX
  • COMMERCIAL / INDUSTRIAL
  • CUMMINS CONVERSION PARTS
  • CPP GEAR
  • USED PARTS
  • SHOP BY BRAND

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    • INTERCOOLER

    INTERCOOLER — 1989–1993 DODGE RAM 5.9L CUMMINS (12-VALVE)

    Lower intake air temps and improve charge-air reliability on your first-gen Dodge Ram D250/D350 (1989–1993) with CPP Diesel. This section covers intercoolers & universal cores, piping, boots, clamps, V-band connections, and sprayer accessories tailored to the VE-pump 12-valve 6BT. Note: factory intercooled trucks are ’91.5–’93; early ’89–’91 trucks can be converted.

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    Featured for 1st Gen

    Why Buy from CPP Diesel

    • First-Gen Focus: Parts vetted for 1989–1993 VE-pump 12-valve trucks.
    • Top Brands: CPP in-house, On 3 Performance, PPE, Vibrant, BD, and more.
    • Expert Support: Help with ’89–’91 non-IC conversions, pipe routing, and clamp selection.
    • Fast Shipping: Popular cores, couplers, and hardware ship quickly from U.S. warehouses.

    Explore the full 1989–1993 Cummins catalog for complementary upgrades.

    Helpful Notes

    • Model years: ’91.5–’93 trucks are factory-intercooled; ’89–’91 conversions require custom mounting and plumbing.
    • Tubing size: Most builds use 3.0–3.5" charge piping; confirm intercooler/turbo outlet sizes and space.
    • Couplers & clamps: Match hose ID to tube OD and use quality band or constant-tension clamps.
    • Leak checks: After install, pressure-test the system and re-torque clamps after a few heat cycles.

    Frequently Asked Questions

    Can I add an intercooler to my early (non-IC) 1989–1991 truck?

    Yes. Many owners use a universal core with custom brackets and boost tubes, plus the right couplers and clamps.

    What size piping should I run?

    For typical towing/street builds, 3.0–3.5" works well. Larger setups may use 4.0" in short sections where space allows.

    Do I need V-bands on the cold side?

    Not required, but V-bands are compact and service-friendly in tight bays. Ensure proper ferrules and alignment.

    Will a bigger intercooler lower my EGTs?

    Usually. A larger core can reduce intake temps and help control EGT under sustained load—monitor with boost/EGT gauges.

    What’s the easiest way to improve IATs without re-piping?

    A universal intercooler sprayer is a quick add-on for short pulls or hot-day towing.

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