EMS – BadAss Build Long Block Engine for 2015-2023 Mustang 2.3L

Price range: $9,811.22 through $12,459.12

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Current build time: 4–5 months from date of order. Sleeved options add approximately 1 month. Turnaround may vary based on parts availability and build queue — we’ll keep you updated throughout the process.

EMS BadAss Build Long Block — built for experienced enthusiasts targeting 700–1000 horsepower, or for anyone who wants a very reliable 800hp setup that can be driven hard without living at the edge of the engine.

Proper fuel system upgrades, supporting modifications, and professional tuning are assumed.

What’s Included

  • New-pinned OEM crankshaft, keyed with matching sprocket and damper
  • MAHLE pistons — 9.5:1 standard or 10.0:1 high compression
  • Boostline I-beam rods
  • New OEM cylinder head with titanium retainers and upgraded valve springs
  • 10mm ARP CA625+ head studs
  • King main and rod bearings
  • New OEM timing cover, oil pump, chain, gear, and guide
  • New OEM valve cover, oil pan, oil pickup tube, and rear main seal
  • Balance shaft delete

Rated for 700whp as built. Add sleeves and it goes to 1000+. Every engine ships as a complete sealed assembly and is compression, leak, and timing tested on our engine stand before it leaves the shop.

Build it your way: new or used ST block, used MZR block, or bring your own. Optional sleeves, pocket porting, copper o-rings, Piper or Kelford cams, and Ross damper.

Backed by our 1 Year Unlimited Mile Warranty.


⚠️ BEFORE YOU BUY — PLEASE READ

EMS Engine Break-In Procedure →
Proper break-in is required to protect your engine and maintain warranty coverage. Review before your engine arrives.

EMS Engine Warranty & Return Policy →
Review coverage terms and exclusions. Note: flamethrower and exhaust ignition systems are excluded from warranty coverage.

(Stroker Build Notice — All EMS performance engines are 2.3L stroker builds. By purchasing, you acknowledge these engines are intentionally stroked from the original 2.0L configuration to 2.3L)

 

Call us (423) 500-4901 or

Email us at sales@emsinc-tn.com

WWW.EMSINC-TN.COM

 

Start your build:

prices include spring kits for selected cams
CNC-machined billet aluminum valve cover for the 2.0/2.3L EcoBoost — fits the Mustang, Focus RS, and Focus ST. Custom fittings for crankcase ventilation, dry sump ready, and available in Anodized EMS Blue or Raw Billet. (SAVE $100)
MANUAL TRANSMISSION ONLY - EMS recommends a new slave cylinder be installed with any new clutch. EMS will not install a new clutch in-house without also installing a new slave cylinder.
This order cannot be processed if Engine Return and Warranty Policies Terms and Conditions are not agreed [LINK BELOW]
If you select installation at EMS, please call the shop to inquire about applicable labor fees. Installation costs are not included in the product price and will vary based on the service required.
EMS - BadAss Build Long Block Engine for 2015-2023 Mustang 2.3L
This item: EMS - BadAss Build Long Block Engine for 2015-2023 Mustang 2.3L
Price range: $9,811.22 through $12,459.12
Price range: $9,811.22 through $12,459.12
EMS - EcoBoost BadAss Billet Valve Cover for 2015-2023 Mustang 2.3L
1 × EMS - EcoBoost BadAss Billet Valve Cover for the 2.0/2.3L EcoBoost Engines w/EMS Logo
Price range: $1,035.00 through $1,125.00
Brisk - RR12S Spark Plugs - 4 spark plugs
$50.00