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  • Image 1
  • Rear velocity stack on right. Front velocity stack on left.
  • TVS-80 compared to TVS-40s
  • Shown in Rottweiler Performance base plate.
  • Magnified value charts.
  • Dyno chart comparison. (See magnified for better view of numbers)
  • Image 7

SD 1290 - TVS-40 Ultra Short Tuned Velocity Stack

$89.95

Product Description

Super Duke owners just got even more tuning options with our new TVS-40-59 series velocity stacks. For those of you looking to slightly mellow your low end and move that power rush further towards the top end, Rottweiler Performance has now created our ultra short series velocity stacks in 40 millimeter lengths. Extensive dyno testing has shown significant top end gains when combining our ultra short stacks with either a front TVS-80 (80mm) stack or another short TVS-40 (40mm) front stack for the ultimate in top end power. If you spend most of your time in the upper RPM ranges, the TVS-40 series stacks are for you.

Combinations are as follows: (First number being the front cylinder velocity stack length)

  • 100/100 - Stock Intake (Max Power 158.21 @ 9370 / Max Torque 97.32 @ 8090 RPM)
  • 100/80 - Stage 2 Intake and up (Max Power 170.29 @ 8720 / Max Torque 106.62 @ 8250 RPM)
  • 80/80 - (Max Power 173.35 @ 8760 / Max Torque 105.18 @ 8250 RPM)
  • 80/40 - (Max Power 174.58 @ 8950 / Max Torque 106.79 @ 8270 RPM)
  • 40/40 - (Max Power 175.42 @ 9020 / Max Torque 106.81 @ 8330 RPM)

Run files for the above comparison can be found here. You must have Dynojet 'Power Core' application on your PC downloaded here. Once downloaded open all of the run files through the 'open' folder that you downloaded and display them all on one page. You may have to set the values to 'power' by clicking on the left hand title (See pic) 'none/Dynoware RT CPU/General/Power'. The bottom should be 'RPM'. 

We didn't stop there. By reshaping the velocity stack with a 180 degree bell-mouth opening and altering the taper of the bore we were able to achieve smoother induction flow characteristics as well as velocity, optimizing the added flow volume of our intake systems. By adding a second TVS-40 velocity stack to the front cylinder, you will realize even further top end gains and smoother running engine over stock. At 60mm shorter you now have more options to play with and customize your power delivery.

For years now tuners have had great success by changing the lengths of the velocity stacks in the intake. Up until now there have been no options for the new model KTMs and now Rottweiler has beautifully machined these from 6061 T6 billet aluminum with a Type 2 black anodize.

Warranty Information

Lifetime warranty. These will last forever. Don't sweat it.

Product Reviews

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  1. This paired with the TVS-80 stack is unbelievable! 5 Star Review

    Posted by on 26th Apr 2017

    As always, the fit and finish is top notch like al Rottweiler Performance products. I have an 80/40 set up and the power is extremely linear. I love the amount of power I have across the RPM range!

  2. Works extremely well paired with the TVS-80 stack up front! 5 Star Review

    Posted by on 26th Apr 2017

    Quality and fitment are top notch as all of Rottweiler Performance products are. Im running an 80/40 set up and I cant be happier. The power is extremely linear, massive power across the RPM range, I LOVE IT!

  3. Great tuning option 5 Star Review

    Posted by on 19th Jan 2017

    Fitted this 40 on the rear with a 80 on the front a results were the best power range

Quantity:
SKU:
TVS-40-59
Shipping Weight:
1.00 LBS
Shipping:
Calculated at checkout