Genesis Coupe (BK) 3.893mm Billet Stroker Kit
Brian Crower
Ordering this with other parts?
If your cart mixes direct-ship parts with items we hold locally, checkout combines them into one delivery charge and picks the cheapest service for each automatically.
To see and choose from the full list of delivery services, we recommend ordering direct-ship parts on their own.
Not CARB-approved. Not eligible for delivery to California, New York or Colorado, and not for use on pollution-controlled vehicles.
Stock by warehouse
Stock shown is what's on the shelf in our US warehouse and is kept up to date. This part ships direct to you from there — see how direct shipping works below.
- Ships direct from our US warehouse — tracked to your door
- Brand new and factory sealed, straight from the distributor
- Fitment & tuning advice from real technicians
Direct shipped from our US warehouse
What Is Direct Shipping?
This part ships straight to you from our US warehouse rather than sitting on our shelf in Clyde. You get a wider range and current pricing — the trade-off is that it takes a little longer to arrive than something we stock locally.
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You Order
Check out as normal and you will get an order confirmation straight away.
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We Place The Order
We order the part the same business day and it is picked from our US warehouse, brand new and factory sealed.
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It Ships To You
It flies direct to your door by courier — it does not route through our workshop. You get the tracking number as soon as it leaves.
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It Arrives
If you ordered anything we stock locally, that ships separately from Clyde — so an order can arrive in more than one delivery.
Delivery Time
Our supplier quotes 2–4 weeks from order to delivery.
No Import Fees
This part ships to you from inside the United States, so there is no customs clearance, no import duty and no brokerage fee.
Any applicable sales tax is calculated at checkout.
Product details
Brian Crower's balanced stroker assembly for the Genesis Coupe 3.8 V6: 4340 billet crank with a 93mm stroke (stock is 87mm), 5.886in H-beam rods, and six custom forged pistons with pins, rings and locks. At the stock 96mm bore that is 4.04 litres; the 4.21 litres Brian Crower quotes is a 98mm bore.
- ProH2K / Sportsman - ARP2000 bolts, rated over 175hp per cylinder.
- ProH625+ - ARP Custom Age 625+, rated at over 250hp per cylinder.
Crank and rods suit the 2010-2012 MPI and the 2013-2016 GDI engine, but the pistons differ, so we confirm engine, bore and compression with you before ordering. Bearings not included. Brian Crower lists it under the G6DA code; it is not catalogued for the front-drive 3.8 in the Azera, Veracruz or Carnival, and does not fit the 2.0T.
Good to know
No claims are made regarding the legality of any parts for road use. Parts are supplied for off-road/competition use only — it is the customer's responsibility to confirm local regulations before fitting parts for road use.