GPM Racing 4140 Carbon Steel Input Shaft Cup (Safe-D) for Arrma 1/8 Kraton 6S EXB V6 (MKV6041S)
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Handled by us in the UK under the Consumer Rights Act — no sending it overseas.
What our customers say
A selection of recent five-star reviews, as written.
-
★★★★★
Ordered flishrc cobra. Communication was great. Ordered larger batteries but they were the wrong size. Olly shipped the right batteries and gave a refund for the difference I paid. Couldn't ask for more. Thanks for the help with the order.
Robert, 22 September 2026
-
★★★★★
Very helpful when the vehicle I wanted wasn't in stock. Very fast deliver too.
Anna Abbott, 17 September 2026
-
★★★★★
Excellent service speedy delivery and good customer service
GLYN, 10 September 2026
-
★★★★★
Great product and service. I enjoy buying from these guys. Thanks to radio-controllled.co.uk.
Paul Jordan, 3 September 2026
-
★★★★★
Dealt with customer services over an order I accidently placed, they were prompt and dealt with it will, completely refunded within a small window of time, thanks!
Oliver Galustian, 23 July 2026
-
★★★★★
Really good online rc store with some great products and sales on. The owner is very knowledgeable as well.
Simon, 19 July 2026
-
★★★★★
Product delivered promptly and in excellent condition 👍had very helpful and prompt responses from Olly to all my questions, I will definitely be using them again 👍
Mark Clucas, 30 January 2026
-
★★★★★
The customer service and advice were first class!
Steve Avery, 9 September 2025
-
★★★★★
The seller knew I was after one and very kindly informed me when they came back into stock so now have a Flywing Bell 206. Fantastic bit of kit. Well worth the wait.
Pete Goddard, 15 April 2025
-
★★★★★
Great service, car arrived fast and really well packaged. Also, I had a little problem....(which turned out to be me doing it wrong) but someone replied the same evening! Will definitely be buying from them again.
Graham Rousseau, 10 February 2025
Key Specs
- Scale
- 1/8
- Weight
- 26 g
About this product
GPM MKV6041S 4140 Carbon Steel Input Shaft Cup
The GPM MKV6041S input shaft cup is manufactured from 4140 carbon steel to deliver a durable replacement for ARRMA KRATON 6S EXB drivetrains. The component is designed to maintain positive engagement if the attachment screw loosens, and the Safe-D configuration integrates the input gear with the drive cup to ensure steady torque transfer under load. Suitable for hobbyists seeking a serviceable, long lasting drivetrain part.
Packing includes
- Input Shaft Cup (Safe-D) – 2pcs
- Set Screw M4x4 – 2pcs
Original Name / Part No:
- Replaces factory part number (#ARA311144)
Compatible Models
- ARRMA 1/8 KRATON 6S EXB 4X4 RTR BRUSHLESS SPEED TRUCK-ARA8708V6
- ARRMA 1/8 OUTCAST 6S BLX 4WD EXTREME BASH STUNT TRUCK RTR-ARA8710
- ARRMA 1/8 OUTCAST 6S BLX 4WD BRUSHLESS STUNT TRUCK-ARA106042
- ARRMA 1/8 TALION 6S BLX 4WD BRUSHLESS SPORT PERFORMANCE TRUGGY WITH SPEKTRUM RTR-ARA106048
- ARRMA 1/8 KRATON 6S BLX 4WD BRUSHLESS SPEED MONSTER TRUCK WITH SPEKTRUM RTR-ARA106040
- ARRMA 1/8 NOTORIOUS 6S BLX 4WD BRUSHLESS CLASSIC STUNT TRUCK WITH SPEKTRUM RTR-ARA106044
- ARRMA 1/8 OUTCAST 6S BLX 4WD BRUSHLESS STUNT TRUCK RTR-ARA106060
- ARRMA 1/7 MOJAVE 6S BLX 4X4 BLX DESERT TRUCK RTR-ARA106058
- ARRMA 1/7 MOJAVE 6S V2 4X4 BLX DESERT TRUCK WITH SPEKTRUM FIRMA RTR-ARA7604V2
- ARRMA 1/8 KRATON 4X4 EXTREME BASH ROLLER SPEED MONSTER TRUCK-ARA106053
- ARRMA 1/7 FIRETEAM 6S 4X4 BLX SPEED ASSAULT VEHICLE RTR-ARA7618
- ARRMA 1/8 KRATON 6S V5 4X4 BLX SPEED MONSTER TRUCK WITH SPEKTRUM FIRMA RTR-ARA8608V5
- ARRMA 1/8 NOTORIOUS 6S V5 4X4 BLX STUNT TRUCK WITH SPEKTRUM FIRMA RTR-ARA8611V5
- ARRMA 1/7 MOJAVE 6S EXB 4X4 Roller Brushless Desert Truck-ARA7204
- ARRMA 1/7 BIG ROCK 6S 4X4 BLX MONSTER TRUCK RTR-ARA7612
- ARRMA 1/8 KRATON 6S EXB AVC 4X4 RTR BRUSHLESS SPEED TRUCK-ARA8708T1
- ARRMA 1/8 NOTORIOUS 6S V6 4X4 BLX BRUSHLESS STUNT TRUCK RTR-ARA8611V6
- ARRMA 1/8 KRATON 6S V6 4X4 BLX BRUSHLESS SPEED MONSTER TRUCK RTR-ARA8608V6
- ARRMA 1/8 TALION 6S BLX 4WD EXTREME BASH SPEED TRUGGY RTR-ARA8707
- ARRMA 1/8 TLR TUNED TYPHON 6S 4X4 BLX BUGGY RTR-ARA8406
- ARRMA 1/8 TYPHON 6S V5 4X4 BLX BUGGY WITH SPEKTRUM FIRMA RTR-ARA8606V5
- ARRMA 1/7 LIMITLESS 8S AVC 4X4 RTR Brushless Street Speed-ARA7816
- ARRMA 1/7 FELONY 6S BLX STREET BASH ALL-ROAD MUSCLE CAR RTR-ARA7617V2
- ARRMA 1/7 LIMITLESS 6S V2 SPEED BASH ROLLER-ARA7116V2
- ARRMA 1/7 INFRACTION 6S 4X4 RTR BRUSHLESS ALL-ROAD STREET BASH-ARA109001
- ARRMA 1/7 INFRACTION 6S BLX V2 ALL-ROAD TRUCK RTR-ARA7615V2
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Made to order: GPM Racing parts are shipped to us from GPM’s factory, so please allow around 14 days for dispatch.
What our customers say
A selection of recent five-star reviews, as written.
-
★★★★★
Ordered flishrc cobra. Communication was great. Ordered larger batteries but they were the wrong size. Olly shipped the right batteries and gave a refund for the difference I paid. Couldn't ask for more. Thanks for the help with the order.
Robert, 22 September 2026
-
★★★★★
Very helpful when the vehicle I wanted wasn't in stock. Very fast deliver too.
Anna Abbott, 17 September 2026
-
★★★★★
Excellent service speedy delivery and good customer service
GLYN, 10 September 2026
-
★★★★★
Great product and service. I enjoy buying from these guys. Thanks to radio-controllled.co.uk.
Paul Jordan, 3 September 2026
-
★★★★★
Dealt with customer services over an order I accidently placed, they were prompt and dealt with it will, completely refunded within a small window of time, thanks!
Oliver Galustian, 23 July 2026
-
★★★★★
Really good online rc store with some great products and sales on. The owner is very knowledgeable as well.
Simon, 19 July 2026
-
★★★★★
Product delivered promptly and in excellent condition 👍had very helpful and prompt responses from Olly to all my questions, I will definitely be using them again 👍
Mark Clucas, 30 January 2026
-
★★★★★
The customer service and advice were first class!
Steve Avery, 9 September 2025
-
★★★★★
The seller knew I was after one and very kindly informed me when they came back into stock so now have a Flywing Bell 206. Fantastic bit of kit. Well worth the wait.
Pete Goddard, 15 April 2025
-
★★★★★
Great service, car arrived fast and really well packaged. Also, I had a little problem....(which turned out to be me doing it wrong) but someone replied the same evening! Will definitely be buying from them again.
Graham Rousseau, 10 February 2025
