KC Stock Plus Billet Turbo L99-03 | 7.3 Powerstroke

The KC Stock Plus Billet Turbo L99-03 is a 100% drop-in stock-sized turbo for late 1999-2003 7.3 Powerstroke pickup trucks, supporting up to 160cc/Stock% injectors. It uses a KC billet compressor wheel, a KC SXE-style turbine wheel, and an upgraded 360 thrust journal bearing design. This is a brand new turbo - NO CORE required. All gaskets, o-rings, and an adjustable wastegate actuator are included.

This is a pre-built upgraded stock-sized turbo, not a larger performance turbo. It retains the factory intake boot for true drop-in fitment, unlike the DIY Balanced Assembly. It will not fit OBS or E99 trucks without modification.

Why The Stock Plus Billet Is the Right Drop-In

This is the correct turbo for late 99-03 7.3 Powerstroke pickup owners running stock-sized injectors who want a true pre-built drop-in upgrade with no core hassle. The stock-sized footprint keeps factory behavior intact while the billet compressor wheel, SXE-style turbine, and 360 thrust journal bearing add faster spool, cooler operation, and more than stock power.

Buy the Stock Plus if your injectors are stock-class up to 160cc and you want a no-compromise drop-in. Step up to a KC300x Stage 1 if you are running 205/30 injectors or larger. If your injector size matches, this is the right turbo to order.

Buyers comparing the Stock Plus vs the DIY Balanced Assembly should know that this version retains the factory intake boot and ships pre-built, drop-in ready, with a 1-year unlimited miles limited warranty. No core return is required.

What the Balanced Assembly Adds

The Stock Plus uses a KC billet compressor wheel paired with a KC SXE-style turbine wheel. The result is faster spool, cooler operating temperatures, and more than stock power output without changing the turbo's overall size or fitment footprint.

The 360 thrust journal bearing design improves thrust load handling compared to factory bearings. The high-flow non-EBPV outlet flange opens up exhaust flow on the back side. An adjustable wastegate actuator gives the buyer boost control flexibility right out of the box.

Compared to the DIY Balanced Assembly version, the Stock Plus arrives pre-built and drop-in ready while retaining the factory intake boot, so installation does not require sourcing a different boot or assembling components.

What Comes In The Box

• KC Stock Plus Billet turbocharger (pre-built, balanced assembly)
• High-flow non-EBPV outlet flange
• Adjustable wastegate actuator
• All gaskets and o-rings for installation

The turbo retains the factory intake boot for true drop-in fitment. Up-pipes, EBPV pedestal upgrades, and tuning are sold separately and recommended for best results.

Stock Plus vs KC300x Stage Turbos

Sizing comes down to injector size and goals. Match your build to the right turbo here:

Running larger injectors? Step up to the Stage 1 or Stage 2.

Recommended Supporting Upgrades

For best results with this turbo, three upgrades are highly recommended but sold separately:

• Upgraded up-pipes
• Upgraded EBPV pedestal
• Hydra programming chip

None of these are included with the turbo. Plan your build accordingly before adding the turbo to your cart.

Exhaust Brakes and Aftermarket Parts

Exhaust brakes are not recommended with this turbo. Some brake brands have clearance issues that hinder performance, rub the turbine wheel, or cause back-pressure conflicts because of how the flapper closes. The added back pressure can be hard on the turbo and motor. Verify fitment and functionality with your specific brake before installing.

Fitment with aftermarket fuel systems, plenums, and piping kits is not guaranteed. If your truck has aftermarket induction or fuel components, confirm clearance before ordering.

Powder Coating and Polished Cover Options

Powder coating adds up to a 3-week lead time before the turbo ships. Turbos ship with the duller factory finish unless a polished cover is specifically requested. A polished cover is available as a $250 add-on with a two-week lead time.

Avoid These Common Mistakes

• Ordering for an OBS truck - this turbo will not fit OBS without modification.
• Ordering for an E99 truck - will not fit E99 without modification.
• Ordering for a van without planning intake boot and downpipe modifications.
• Running larger than stock-sized injectors - step up to a KC300x Stage turbo.
• Expecting Stage-level performance from a stock-sized turbo.
• Assuming exhaust brake compatibility without verifying clearance.
• Forgetting the 3-week lead time on powder coating before ordering.

Fitment Coverage

Designed for direct fit on late 1999-2003 7.3 Powerstroke equipped pickup trucks. Will not fit OBS trucks or E99 trucks without modification. Will drop into 7.3 equipped vans, but the intake boot and downpipe must be modified for proper fitment.

Final Fit Check

• Late 99-03 7.3 Powerstroke pickup confirmed (not OBS, E99, or van).
• Injectors are stock-class up to 160cc.
• Supporting upgrades (up-pipes, pedestal, chip) planned separately.
• Non-CA / non-CO shipping address confirmed.
• Lead time understood if powder coat or polished cover is added.

For a late 99-03 7.3 Powerstroke pickup running stock-class injectors and looking for a true pre-built drop-in upgrade, this is the correct Stock Plus Billet turbo to order.

Frequently Asked Questions