Introduction: Why the BorgWarner EFR 9174 for Your 5.7 Hemi?

For 5.7 Hemi owners craving serious horsepower gains without sacrificing daily drivability, a turbocharger upgrade is often the most effective path forward. The BorgWarner EFR 9174 has emerged as a top-tier choice among builders because it combines advanced aerodynamics, a lightweight titanium-aluminide turbine wheel, and integral wastegate options that make packaging easier. Unlike older turbo designs, the EFR 9174 spools quickly, supports a wide power band, and can handle up to roughly 850 engine horsepower—making it a perfect partner for the 5.7 Hemi’s 350–400 hp baseline.

But before you start planning for 600+ wheel horsepower, you need a realistic budget. The total cost doesn’t stop at the turbo itself; supporting fuel, exhaust, intake, tuning, and labor can quickly add up. This article breaks down every major expense, offers tips to control costs, and gives you the knowledge to avoid common pitfalls. Whether you’re doing a weekend garage build or hiring a top shop, understanding the full price landscape will help you build a reliable, high-horsepower Hemi.

Understanding the 5.7 Hemi Engine and Turbocharging

The 5.7-liter Hemi V8 (often called the “Eagle” or third-generation Hemi) is a popular platform for forced induction because of its sturdy cast-iron block, six-bolt main caps, and aluminum cylinder heads. Factory compression ratios vary by model year—typically 9.6:1 or 10.5:1. While high compression helps naturally aspirated power, boost requires careful management to avoid detonation. The EFR 9174’s billet compressor wheel and low-inertia turbine allow efficient spool without overshooting boost targets, making it easier to tune safely on pump gas.

Turbocharging the 5.7 Hemi also means dealing with placement. The engine bay is tight in most vehicles (Chrysler 300, Charger, Challenger, Ram trucks, Jeep Wrangler). A quality kit designed for the EFR 9174 will include a custom turbo manifold, downpipe, and charge pipe routing to fit your specific chassis. This is one area where buying a complete kit—rather than piecing parts—often saves money and headache. However, “complete” can still cost $5,000–$9,000 as detailed below.

Full Cost Breakdown: Components and Services

1. BorgWarner EFR 9174 Turbocharger

The centerpiece of your upgrade. The EFR 9174 is available in several frame sizes (divided T4 or T4 divided tang) and outlet configurations. Pricing typically lands between $1,800 and $2,600 new from reputable dealers like Full-Race or ATP Turbo. Used units occasionally appear on forums for $1,200–$1,500, but buying used carries risk of damaged bearings or shaft play. Many builders recommend a new unit for a boosted street car. The turbo includes an integral recirculation port (convenient for blow-off valve plumbing) and a proprietary ceramic dual ball bearing cartridge that needs no external oil restrictor when used with stock oil pressure.

External link: Full-Race BorgWarner EFR product page

2. Turbo Manifold

You need a manifold designed to route exhaust gases to the EFR 9174. Options include cast stainless manifolds (more durable, less prone to cracking) or tubular mild steel/T304 stainless (lighter, higher flow). Prices range from $600 to $1,200. Brands like A&A Corvette, Hellion, or custom fabricators charge $800–$1,500 for a well-made manifold that fits a specific vehicle. Expect to pay the higher end if you need a dual-purpose manifold with provisions for external wastegates or a screamer pipe.

3. Wastegate and Blow-Off Valve

The EFR 9174 can be ordered with an integral wastegate (IWG) model for simpler packaging, but many high-horsepower builds opt for a 48–60mm external wastegate for better boost control. A quality unit from Tial, Turbosmart, or Precision costs $250–$400. A blow-off valve (BOV) is essential to protect the compressor wheel on throttle lift; expect to spend $100–$250 on a Tial Q or similar.

Total for wastegate + BOV: $350–$650.

4. Intercooler and Charge Piping

For a 5.7 Hemi boosted to 8–12 psi, an intercooler core with at least 600–700 HP capacity is recommended. A bar-and-plate unit from Bell, Garrett, or a kit-specific cooler runs $300–$700. Charge pipes (2.5” or 3”) plus silicone couplers and T-bolt clamps add another $200–$400 if not included in a kit. Many complete kits bundle intercooler and piping to ensure fitment—worth the extra if your vehicle is a Challenger or Ram.

5. Fuel System Upgrades

Stock fuel injectors on the 5.7 Hemi max out around 400 wheel horsepower on E85 or ~450 on pump gas. For 600+ hp you need:

  • Fuel injectors: 800–1000cc for pump gas, larger for E85. Price: $300–$600 for a set of eight.
  • Fuel pump: In-tank 450–525 lph pump (e.g. Walbro, DeatschWerks) or a small surge tank + external pump. Cost: $200–$500 for pump plus installation kit.
  • Fuel pressure regulator: A boost-referenced regulator (Aeromotive, Fuelab) $150–$250.
  • Return line kit: If converting to a return-style system, add $100–$300 for lines, fittings, and hardware.

Total fuel system (DIY install): $750–$1,650. Professional installation can double this.

6. ECU Tuning

You cannot run a stock 5.7 Hemi ECU with a turbo without proper tuning. Options include:

  • DiabloSport Trinity 2 + custom tune: ~$700–$900 (device + remote tuning logs).
  • HP Tuners VCM Suite + custom dyno tune: $500–$1,000 for the software/interface, plus $300–$600 for dyno time.
  • Standalone ECU (Holley Dominator, MoTeC): $2,000–$4,000+ for extreme builds.

For most street builds, HP Tuners or DiabloSport with a professional remote tune is sufficient. Expect to spend $500–$1,200 for a reliable, safe tune that includes fuel, ignition, and boost control mapping. A dyno session adds $400–$600, but yields a more precise result.

External link: HP Tuners official website

7. Labor Costs (if not DIY)

Installation complexity is high: pulling the intake manifold, exhaust manifolds, fuel system work, intercooler mounting, and wiring for wideband/HPT logging. Shop rates range $100–$150/hour. A full turbo kit install on a 5.7 Hemi can take 15–25 hours for an experienced shop, yielding $1,500–$3,750 in labor. If you also need the shop to fabricate charge pipes or modify the exhaust, expect the higher end. Many enthusiasts save by doing the mechanical work themselves and paying only for dyno tuning.

Total Estimated Costs

Here’s a consolidated table of typical ranges for a complete 5.7 Hemi turbo system using the BorgWarner EFR 9174:

Component Cost Range (USD)
BorgWarner EFR 9174$1,800 – $2,600
Turbo manifold (with gaskets/hardware)$600 – $1,200
Wastegate + Blow-off valve$350 – $650
Intercooler + Charge piping$500 – $1,100
Fuel injectors + pump + regulator$750 – $1,650
ECU tuning (software + tune)$500 – $1,200
Optional: Dyno tuning+$400 – $600
Labor (if not DIY)$1,500 – $3,750
Total (DIY)$4,500 – $8,400
Total (shop installed + dyno)$6,500 – $12,000+

These ranges assume no catastrophic failures or hidden damage. If your Hemi has high mileage, you may need to replace gaskets, timing chain, or even the oil pump during installation—adding another $500–$1,500.

Often Overlooked Expenses

Engine Bay Modifications

Depending on your vehicle, you may need to relocate the battery, trim structural bracing, or modify the radiator shroud. Average cost for small fabrication: $100–$400 if you pay someone.

Cooling System Upgrades

Boosted engines generate more heat. Upgrading to a high-flow water pump, proper coolant, and possibly a larger radiator or electric fans costs $300–$800.

Clutch or Torque Converter

Automatic transmissions require a upgraded torque converter (about $300–$600) and possibly a transmission cooler. Manual cars need a clutch rated for 600+ hp ($400–$700). Factor in $300–$800 if you do the work yourself, double if a shop does.

Exhaust System

The downpipe may not connect to your existing cat-back. A 3” or 3.5” turbo-back system adds $500–$1,200. You might also need mufflers that can handle the tone.

Insurance & Registration

Some states require smog checks. A turbo kit likely needs CARB approval (rare for EFR). Be prepared for possible inspection hurdles or insurance premium hikes of 10–25%.

Is the BorgWarner EFR 9174 Worth the Price?

Compared to other turbo options like a Precision 6466 or Garrett GTX3582R, the EFR 9174 offers faster spool thanks to its lightweight turbine wheel and advanced aerodynamics. On a 5.7 Hemi, you can expect full boost (8–10 psi) by 3,500–3,800 RPM, and the power curve stays strong well past 6,500 RPM. This makes it an excellent street turbo—responsive enough for daily driving, yet capable of 700+ wheel horsepower on E85 and aggressive boost.

Many owners report gains of 150–200 wheel horsepower at conservative 6.5 psi on 91 octane, and 250–350 whp gains on E85 with 10–12 psi. The EFR’s integral recirculation port and ceramic ball bearings also reduce oil contamination and dragging, increasing longevity. Given the EFR 9174’s price premium of $400–$600 over similar Chinese clones, the reliability and off-the-shelf support justify the cost for a build you plan to keep for years.

External link: BorgWarner EFR official product info

DIY vs. Professional Installation: Which Route Saves More?

A full DIY installation can save you $1,500–$3,000 in labor, but requires the right tools: a lift or tall jack stands, a shop press for intercooler piping, a welder if modifications are needed, and a scan tool for initial startup. It also demands a weekend (or three) of work and the confidence to manage fuel system pressurization and turbo oil return. If you’re experienced with engine swaps or heavy modifications, DIY is feasible. For those with minimal experience, a professional install often prevents costly mistakes (like oil starvation or boost leaks) that can damage the turbo or engine.

Hybrid approaches work best: do the mechanical assembly yourself (intake, turbo, intercooler) and have a shop handle wiring, fuel lines, and final tuning. This cuts labor to 5–10 hours ($500–$1,000) and gives you the peace of a professional safety check.

Budgeting Tips for Your Turbo Upgrade

  • Buy a full kit: Hellion, Premium Turbo, or CXRacing offer pre-engineered kits for the 5.7 Hemi in many chassis. They save time and ensure parts fit together. Expect to pay $4,000–$6,500 for a kit including turbo, manifold, intercooler, piping, and wastegate—leaving only fuel, tuning, and labor.
  • Refurbished or used quality parts: Watch forums like LXForums or ChallengerTalk for used EFR 9174s, but always inspect for shaft play and flaking on compressor wheels. Rebuilt units from reputable sellers can save 30%.
  • Select the correct fuel: E85 requires larger injectors and a fuel system capable of 30% more flow, but it supports higher boost and detonation resistance. If you plan to run pump gas primarily, you can use smaller injectors ($300 vs $500) and save on a high-flow pump.
  • Do your own tuning research: Many HP Tuners communities share base tables for 5.7 Hemi turbo builds. While you still need a professional tune, having a baseline can reduce dyno time (and cost) from $600 to $300.
  • Purchase during sales: Black Friday, Cyber Monday, and holiday sales from Summit Racing, Jegs, or Full-Race often lower turbo prices by 10–15%.

Conclusion: Plan, Budget, and Build Smart

Upgrading to a 5.7 Hemi turbo kit with the BorgWarner EFR 9174 is not a cheap undertaking—you should expect to spend somewhere between $5,500 and $10,000 all-in for a reliable, street-friendly setup that delivers 550–700 wheel horsepower. The cost includes not just the turbo itself, but the manifold, intercooler, fuel system, tuning, and labor. Overlooking any of these can lead to poor performance, drivability issues, or engine damage.

We’ve laid out the detailed breakdown above to help you itemize each component and make trade-offs based on your skills, goals, and budget. By choosing a quality turbo like the EFR 9174, investing in proper tuning, and planning for supporting modifications, you can build a 5.7 Hemi that is both thrilling and durable. Always remember: cheap out on the wrong part and you’ll pay double down the road. Stick to known brands, use a professional tuner, and keep maintenance priorities in sight. With the right plan, your turbocharged 5.7 Hemi will reward you every time you hit the throttle.