TURBOCHARGERS & ACCESSORIES — 1989–1993 DODGE RAM 5.9L CUMMINS (12-VALVE)

From stock-style replacements to proven S300 SX-E upgrades and full compound kits, CPP Diesel has the turbo parts to match your First-Gen’s power goals. Shop complete turbos, install hardware, oil lines, downpipes, exhaust manifolds, and V-band components that fit 1989–1993 D250/D350 & W250/W350.

Shop by Subcategory

• SINGLE TURBOS (S300/Holset/H1C/HX) — drop-in & performance singles.
• COMPOUND TURBO KITS — staged S300/S400 systems for big airflow.
• TURBO ACCESSORIES — elbows, actuators, oil lines, clamps & more.
• EXHAUST MANIFOLDS — T3/T4 options, gaskets & hardware.
• DOWNPIPES (HX/H1C/HX40) — correct outlet and chassis fitment.
• V-BAND FLANGES & CLAMPS — secure, leak-free turbo connections.
• INTAKE MANIFOLDS & BOOST TUBES (’91.5–’93) — charge-air plumbing for intercooled trucks.

Featured for 1st Gen

• DPS S369/73 Ball-Bearing VGT (T3) — high output; requires HX40-style downpipe.
• CPP 3910990 HX35 5-Bolt Outlet Flange — easy HX outlet retrofit.
• Diamond Eye 220100 3″ Downpipe (’89–’93 4×4) — correct chassis fit.
• CPP 12″ Flexible Turbo Oil Drain — leak-free S300/S400/HX drain solution.
• Cummins T3 Inlet Gasket 3949530 — OE-style turbo mounting seal.
• V-Band Flanges (S300/S400) — weld flanges for custom piping.

Why Buy from CPP Diesel

• First-Gen Focus: Parts curated for VE-pump 6BT spool, fitment and towing needs.
• Trusted Brands: BorgWarner, DPS, BD Diesel, Diamond Eye, Cummins, CPP hardware.
• Expert Support: Sizing help (62/68/.70 T3 street/tow to big S300/S400 builds), outlet & downpipe pairing, and oil line routing.
• Fast Shipping: Popular turbos and install parts ship quickly from U.S. warehouses.

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

Helpful Notes

• Outlet type: Many performance S300/S400 units need an HX40-style outlet and matching downpipe.
• Manifold flange: Most First-Gens use T3; verify A/R and housing for your power/spool goals.
• Oil lines: Always replace aged drains and verify feed restriction for new center sections.
• Intercooled years: ’91.5–’93 are factory-intercooled—match charge pipes accordingly.
• Compliance: Check local regulations when modifying emissions-related components.

Frequently Asked Questions

What’s a solid street/tow turbo for a mostly stock 12-valve?

A modern S300 SX-E 62/68 with a tight T3 housing is a popular choice for quick spool and ~300–400 hp with proper fueling and exhaust flow.

Do I need an HX40 downpipe with my upgrade?

Many S300/S400 and larger Holset upgrades use an HX40-style 4.0″ outlet. Pair with the correct downpipe or an adapter outlet flange.

Will my ’89–’90 non-intercooled truck need extra parts?

Non-IC trucks may require additional charge-air plumbing. Intercooled pipes & boots (’91.5–’93) can be used when converting to an intercooler.

What install hardware should I refresh?

Use new T3 inlet gaskets, outlet seals, and a quality oil drain. Check studs/fasteners and V-band hardware.

How big can I go on a single?

Singles beyond mid-60 mm compressor wheels can get laggy for towing. For higher power with drivability, step into a compound kit.