YPG Motorsport
BMW S65 Forged Internals — 1,000HP+ Rated | I-Beam Rods, Pistons, Rings | YPG Motorsport
BMW S65 Forged Internals — 1,000HP+ Rated | I-Beam Rods, Pistons, Rings | YPG Motorsport
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BMW S65 Forged Internals — I-Beam Rods & Pistons Kit
The BMW S65 4.0L naturally aspirated V8 is one of the most celebrated engines BMW M has ever built — the heart of the legendary E90/E92/E93 M3. While the stock internals handle the factory 414HP reliably, any serious power build — whether supercharged, turbocharged, or high-RPM naturally aspirated — demands stronger internals. Our S65 forged internals kit replaces the factory cast components with race-grade forged units rated for serious power on pump fuel, E30, or full E85.
What's Included:
Forged connecting rods — 4340 aircraft-grade steel, I-beam design, 140.72mm centre-to-centre
Forged pistons — CP or equivalent specification, 92.00mm bore (stock bore)
Compression Ratio: 12.0:1 (stock compression)
Pin Diameter: 21.00mm
Big-End Bore: 56.00mm
ARP 2000 rod bolts included — 220,000 PSI rated (3/8")
AMPCO 18 wrist pin bushings — superior wear and fatigue resistance
Balanced and matched set — within ±1g
Ring set included
Set of 8 (complete V8 set)
Power Capability:
Standard ARP 2000 configuration — 1,000HP capable (200HP+ per cylinder)
Optional ARP L19 upgrade — up to 260,000 PSI for extreme builds
Suitable for supercharged, turbocharged, and high-RPM NA builds
9,000+ RPM capable
Compatible Vehicles:
BMW M3 — E90 Sedan (2007–2013)
BMW M3 — E92 Coupe (2007–2013)
BMW M3 — E93 Convertible (2007–2013)
BMW M3 GTS — E92 (2010–2011) · S65B44 4.4L variant
All S65 variants — S65B40, S65B40A, S65B44
Why Upgrade the S65 Internals?
The stock S65 uses forged aluminium pistons and fracture-split connecting rods from the factory. While adequate for the naturally aspirated setup, forced induction builds or high-RPM endurance applications push the factory rods past their design limits. The stock rods are the first failure point — typically bending or failing at the big end under sustained high-boost or high-RPM operation. Upgrading to 4340 I-beam forged rods with ARP fasteners and matched forged pistons gives you a bottom end that can handle supercharger kits, turbo conversions, and sustained track abuse without compromise.
Engineering Details:
Shot-peened for stress relief
Multi-stage heat treated for maximum strength and fatigue life
CNC machined to ±0.001mm centre-to-centre tolerance
Magnaflux inspected for material consistency
Finite Element Analysis (FEA) optimised beam profile
Straight-cut pin end for increased durability (requires aftermarket pistons — included in kit)
Related Products
- BMW N55 Forged Internals — 1,500HP Rated | Pistons, Rods, Rings — $4999.00
- BMW B58 Forged Internals — 1,500HP Rated | Pistons, Rods, Rings — $4999.00
Frequently Asked Questions
How much does the BMW S65 Forged Internals | I-Beam Rods & Pistons cost?
The BMW S65 Forged Internals | I-Beam Rods & Pistons kit is $5,999.00 through YPG Motorsport with free worldwide shipping.
Are these drop-in replacements for the S65?
Yes. Direct drop-in replacement for factory S65 connecting rods and pistons. 92.00mm bore with 12.0:1 stock compression ratio. Set of 8 for the complete V8.
Do you ship forged internals worldwide?
Yes. Free worldwide shipping on all YPG Motorsport forged internals.
Why I-beam rods instead of H-beam for the S65?
The S65 is a high-revving V8 that thrives on RPM. I-beam rods are lighter and distribute loads more evenly at high RPM, making them the ideal choice for the S65's 8,300+ RPM operating range. They also provide better piston clearance in the compact V8 block.
FAQ
CAN I FINANCE MY ORDER
Yes. We offer a range of finance products.
We offer the widely adopted Klarna and ClearPay for split weekly payments.
We also offer longer term instalments via Klarna and NewPay.
Please speak to a member of our team using the live chat or via email at sales@reinhartautohaus.com if you have any further questions.
WHAT IS YOUR RETURN POLICY?
Our policy lasts 14 days. If 14 days have gone by since your product arrives with you, unfortunately we can’t offer you a refund or exchange.
You can read our full returns policy here.
DO YOU SHIP WORLDWIDE?
Yes. We ship worldwide. We have shipped to over 75 countries to date.
WILL MY PRODUCTS INCLUDE A WARRANTY?
Yes. All products sold on the Reinhart Autohaus store may include any manufacturer warranties. For more information on warranties, check our terms.
Please speak to a member of our team using the live chat or via email at sales@reinhartautohaus.com if you have any further questions.
HOW LONG WILL IT TAKE TO ARRIVE?
Delivery times will vary depending on product, time of year, location and courier used.
Generally items in the UK will arrive within 1-3 days for express shipping and 2-5 days for standard or free shipping.
For shipping outside of the UK, times will vary from 2-5 days for express shipping and 3-10 days for standard shipping.
Please speak to a member of our team using the live chat or via email at sales@reinhartautohaus.com if you have any further questions.
WILL THESE PRODUCTS EFFECT MY VEHICLE WARRANTY
Some modifications can affect the manufacturer warranty provided with your vehicle.
Whilst Reinhart Autohaus can advise, we cannot confirm if a product will or will not affect your vehicle warranty. It's always advised to check with your dealer and finance provider prior to purchasing and installing parts.
Please speak to a member of our team using the live chat or via email at sales@reinhartautohaus.com if you have any further questions.
WILL THIS FIT MY CAR
Please check the product page of the product in question, we include fitment information on every product.
If this information is missing, please speak to a member of our team using the live chat or via email at sales@reinhartautohaus.com if you have any further questions.