Cost Breakdown: Upgrading to a 4B11T with Cobb Tuning Power Packages for $3,200

Engine swaps and performance upgrades are often seen as expensive, high-budget projects reserved for deep pockets. But the 4B11T – the turbocharged 2.0-liter four-cylinder from Mitsubishi’s Evo X – combined with Cobb Tuning’s proven power packages offers a surprisingly attainable path to serious horsepower. While a full brand-new swap with professional labor can easily top $5,000, a carefully sourced build using used components, smart part choices, and some DIY effort can land you at or under $3,200. This article breaks down how to get there, what each component costs, and where you can cut corners without cutting performance.

Understanding the 4B11T Engine

The 4B11T is Mitsubishi’s evolutionary leap from the legendary 4G63. It’s an all-aluminum, DOHC, 16-valve inline-four with MIVEC variable valve timing and a twin-scroll Mitsubishi TD05HRA turbocharger from the factory. Found in the Evo X (2008–2015), it delivers 291 hp and 300 lb-ft of torque stock. More importantly, the block is extremely stout, with a closed-deck design and forged connecting rods, making it capable of handling 500+ whp with proper fueling and tuning. Its wide availability in the used market – often pulled from wrecked or parted-out Evos – makes it a cost-effective upgrade for many platforms, including Mitsubishi Lancer, Outlander, and even RWD swaps into other cars.

Because the 4B11T is a relatively modern engine, it includes integrated control systems that work seamlessly with the factory ECU. However, to unlock its full potential after swapping, you need a capable tuning solution – which is where Cobb Tuning enters the picture.

The Cobb Tuning Power Package – What’s Included

Cobb Tuning offers several pre-configured power packages for the 4B11T, ranging from Stage 1 (intake + tune) to Stage 3 (full bolt-ons + intercooler). For a budget-conscious upgrade targeting $3,200, the Stage 2 package is the sweet spot. Here’s what a typical Stage 2 package includes and why each piece matters:

ECU Reflash (AccessPORT + Off-the-Shelf Map)

The Cobb AccessPORT is the heart of the upgrade. It plugs into your OBD-II port and uploads a calibrated tune – no custom dyno session needed for the base package. Cost new: $595 (often found used for $400–$450). The tune adjusts boost, fueling, timing, and throttle response to match the upgraded hardware.

High-Flow Intake System

A larger-diameter intake removes the restrictive factory airbox and MAF housing. Cobb’s SF Intake is engineered for a specific MAF transfer function, so the AccessPORT tune works correctly out of the box. New: $329. Used: as low as $150.

Upgraded Intercooler

The 4B11T runs hot under boost; the stock intercooler heat-soaks quickly on repeated pulls. Cobb’s front-mount intercooler (FMIC) drops charge temps by up to 40°F, allowing consistent power. New: $649. Used: $300–$400.

Performance Exhaust System

A freer-flowing cat-back exhaust reduces backpressure and improves spool. Cobb’s 3-inch cat-back with resonated midpipe is designed to pair with their tunes. New: $599. Used: $250–$350.

Boost Control Solenoid (Cobb 3-Port EBCS)

To control boost precisely above stock levels, the factory boost solenoid must be replaced. Cobb’s 3-port EBCS provides faster, more accurate boost response. New: $149.

Together, the listed package retails new at about $2,321, but on the used market you can often find complete Stage 2 bundles for $1,200–$1,600.

How to Achieve a $3,200 Upgrade

The headline figure of $3,200 assumes a balance between used engine procurement and a partial Cobb package. Here are three key strategies that bring the total down.

1. Source a Used 4B11T Engine

A brand-new long block from Mitsubishi costs over $4,000 – alone it would blow the budget. Instead, buy a used 4B11T from a parted-out Evo X. Complete engines with turbo, injectors, intake manifold, and accessories typically sell for $1,500–$2,000 on eBay or Mitsubishi forums. Look for engines with 60,000–80,000 miles; they’re still very healthy and include the OEM turbo that’s already capable of 350 whp with tuning.

2. Buy a Partial Cobb Package – or Just an AccessPORT

You don’t need the entire Cobb Stage 2 kit to hit your budget. The single most impactful component is the AccessPORT with a custom or off-the-shelf tune. Using the AccessPORT alone (Stage 1) on a stock 4B11T with an upgraded intake can yield 280–300 whp – already a huge gain over many base engines. If you buy a used AccessPORT for $400 and a used intake for $150, you’re at $550 for the tuning side. Then add a used 3-port EBCS for $50. That’s $600 total for electronics and intake.

3. Perform Installation Yourself

Professional labor for an engine swap typically runs $600–$800, and a shop may charge another $150–$300 for a baseline tune. If you have basic mechanical skills, a weekend, and a jack, you can save that entire amount. The 4B11T swap into a compatible chassis (like a Lancer or a RWD car with adapter plate) is well-documented online. Many engine compartments are designed for the same family of engines, so mounting points often align with minimal fabrication.

Full Cost Breakdown: Budget vs. Premium

Budget Scenario (Under $3,200)

  • Used 4B11T long block (incl. turbo & injectors): $1,600
  • Used Cobb AccessPORT: $425
  • Used Cobb SF Intake: $150
  • Used Cobb 3-port EBCS: $50
  • Used cat-back exhaust (generic or Cobb): $250
  • Gaskets, fluids, hoses, misc.: $200
  • DIY labor: $0

Total: ~$2,675 – well under $3,200, with room to upgrade to an intercooler later.

Premium Scenario (All New, Professional Install – $5,100)

  • New 4B11T long block: $4,200
  • New Cobb Stage 2 Package (full list above): $2,321
  • Labor – engine install: $700
  • Labor – tuning and verification: $250

Total: ~$5,471 (slightly above the original $5,100 estimate due to current pricing, but in line).

Performance Expectations & Real-World Gains

With the budget build above (used engine + AccessPORT + intake + EBCS + exhaust), you can expect 330–350 whp on 93 octane pump gas, with a torque peak in the low 4,000 rpm range. That’s an increase of roughly 50–60 hp over a stock Evo X – and most importantly, it transforms the driving experience in any lighter chassis. The Cobb tune dials out the factory lean spots and sharpens throttle response, making the car feel far punchier.

If you later add a used Cobb intercooler (another $300–$400 on the used market), power can climb to 370–380 whp, all on the factory turbo. The 4B11T will still be well within its reliability margin at these levels.

Additional Considerations

Before pulling the trigger, keep these points in mind:

  • Engine Condition: Always do a compression and leak-down test on a used 4B11T before buying. A healthy engine should read 150–170 psi across all four cylinders with less than 10% variance.
  • ECU Compatibility: The 4B11T uses a separate ECU (unless you’re using a standalone). If your chassis originally had a different engine, you’ll need to either wire in the Evo ECU or use a harness adapter. For Lancer swaps, many factory connectors are compatible.
  • Fuel System: Stock Evo X injectors (560cc) are fine up to 350 whp. Beyond that, upgrade to 1,000cc or 1,200cc injectors ($200–$300 used).
  • Why Cobb Over Others: Cobb’s off-the-shelf maps are meticulously tested and emissions-legal in many states. Their AccessPORT also lets you monitor real-time data and flash on the fly. For a budget build, it’s the most user-friendly route.

Final Thoughts

The $3,200 price point for a 4B11T upgrade with Cobb Tuning power packages isn’t just a clickbait number – it’s a realistic target if you embrace used parts and sweat equity. The engine’s overbuilt nature and Cobb’s plug-and-play ecosystem make this one of the best value swaps in the performance world. Whether you’re waking up a daily driver or building a track toy, the combination delivers hundreds of dollars in savings compared to a full retail build, with almost identical output. Do your homework, buy smart, and you’ll have a bulletproof 350 whp machine for less than the cost of a used Civic.

For further reading, check Cobb Tuning’s official Evo X stage guide, browse the EvolutionM forums for used engine sales and swap tips, and get pricing from a trusted retailer like RallySport Direct to compare new and used options.