Serpent Cobra GT 3.1 Team Edition 1/8th nitro GT kit


Serpent  have introduced the updated version of the Cobra GT. The Cobra GT is a very popular choice in this class with superb performance and being known as a very durable car too. Time to add some extra refinement. The Cobra GT is sensitive on the shock-angle and position both front and rear and that have been fine-tuned even more. The new version aluminum shock extensions in the front and rear are a bit longer than before, as testing showed a good increase in handling. The new super-durable carbon fibre shocktowers and new upper hardcoated alu shock mounts make things perfect. The brake of the new Serpent SRX8 1/8 buggy bolts straight into the Cobra GT and is more effective with its steel disk brakes and pre-glued brake pads. A smoother brake feel, less fading if any and easy to maintain. The Cobra GT 3.1 version gets the most popular shock springs as standard, and same goes for the ball raced anti-roll bars and shock and diff oils.

Main new features

  • SRX8 brake-set and aluminum center brackets
  • Carbon shock towers in 4.5mm enabling new front and rear geometry
  • New version shock extension front and rear in 7075 T6 aluminum
  • New type hard coated aluminum shock mounts front and rear
  • Silver front and rear black springs for the big bore shocks
  • Anti-roll bar   2.3 front and 2.7 rear Main other features
  • Aluminum 6 degree c-hubs 7075 T6
  • Aluminum rear uprights 7075 T6 -3mm chassis coated 7075 T6
  • Spring steel driveline and axles
  • XLi8 2 speed gearbox
  • 4 shoe carbon clutch
  • Heavy duty suspension arms
  • 2 gear differentials
  • Low CG radio plate / servo mounting

Explaining the main features

  • New aluminum shock absorber riser’s front and rear

The durable machined aluminum shock-risers front and rear allow for a more progressive angle of the shock absorber creating more overall grip and more predictable cornering.

  • New shock towers front and rear

The new 4.5mm lower carbon fiber shock towers also accommodate the new shock angles, with a choice of 5 holes for further fine-tuning, and 9 choices for roll center position on the camber-bracket/tower.

  • New type hard coated aluminum shock mounts front and rear

Lightweight but durable hardcoated alumnium 7075 T6 threaded mounts. Easy to mount.

  • New SRX8 brake system

The brake system comes from the SRX8 buggy and features steel brake disk and brake pads with glued on high friction brake material

  • XLi superlight 2-speed gearbox

The XLi gearbox comes from the Viper 977-Evo kit and is well proven for performance and durability, as well as ease of setting. The lower inertia will make you accelerate faster.

  • Aluminum middle bearing blocks

To hold the 2-speed gearbox/shaft as well as the SRX8 double brake system superlight aluminum bearing blocks are designed.

  • Front front and front rear aluminum suspension holders

These are designed to change the pivot pin angle, so the lower wishbones will be straighter, which geometry suits on road racing better.

  • Aluminum c-hubs in 6 degree version

The new aluminum c-hubs are needed to make maximum use of the new pivot pin / wishbone angle. CNC-machined from 7075 T6 aluminum, laser engraved and black anodized units.

  • Aluminum, uprights for new rear geometry

To allow a better on road geometry we designed these new CNC machined aluminum uprights, black anodized and laser engraved.

Overall features/specs

  • Chassis plate

Chassis plate in 3mm 7075 T6 aluminum, with machined pockets to create flex and or make it lighter. Kick-up angle on front as need due to the race-rules. Countersunk holes. Slots to locate the front and rear suspension mounts precisely. Angled sides to increase stiffness. Open pockets to access flywheel and 2-speed gearbox. Laser engraved Cobra GT logo.

  • Bumper

Captured foam bumper set, with wide foam bumper and strong upper and lower bumper-plate.

  • Chassis stiffeners

Composite stiffener front and rear, to give extra stiffness, but still allow some flex as needed.

  • Central disk brake system SRX8

Very low and centrally placed brake system for low center of gravity with steel brake disks, combined with steel brake pads with glued on high friction brake material.


Composite radio box which offers space for the lay-down steering servo and the upright placed brake-throttle servo. Sufficient spacers are supplied for correct fitting of the servos. The receiver and battery can be placed safely under the large cap. The transponder can be mounted in the central part, between servo and receiver box. The whole assembly including linkages can be taken off easily and fast in one go, when cleaning the car, or doing maintenance.

  • Servo arms and linkages

The servo arms have a splined insert to have the right fit per brand. The linkages run very clean and tight and are easy to access to modify settings.

  • Suspension brackets

Beautifully machined 7075 T6 suspension brackets in anodized, laser engraved. Precision fit for the nylon roll center inserts and pivot balls / pins. The GT 3.1 front suspension brackets make the pivot-pin and lower arm more horizontal, which improves handling and steering.

  • Steering blocks assembly

Composite steering blocks combined with 6 dgr C-hubs for precise steering. Spring steel wheel-axles with large size bearings 8x18x5 and 15x21x4 with precision threaded aluminum wheel-hubs with +3 offset. Flanged wheel nuts to guarantee that you will not lose a wheel nut in a race.

  • Rear anti-roll bar

The ball raced front anti-roll bar system, consist of a spring steel bend wire, which is guided through the diff-cases and runs in ball raced steel adaptors. The wire is comlinked to the lower suspension arm, with a captured adjustable threaded pivot ball, for very precise and low friction operation.

  • Shock tower rear / aluminum shock-risers

New 4.5mm thick carbon shock tower, integrated into the rear section for extra stiffness, with 5 upper positioning holes for the shocks and 6 holes for roll-center positions. The durable machined aluminum shock-risers in the rear allow for a more on road aimed angle of the shock absorber creating more overall grip and more predictable cornering.

  •  Angled steering system / servo saver  

The bell cranks are angled to reduce the angle of difference between the total caster and steering plane. Therefore you will have less bump steer and a truer steering Ackerman through the entire range of suspension

  • Ackermann plates  

With the design of the steering bell cranks when changing the Ackermann you will not need to adjust your steering tie rods. You simply will only need to adjust your end points on your radio.

  • Rear suspension arms  

Durable oversized lower suspension arms in strong composite nylon. On the lower side the special down stops screws are mounted. The lower shock-mounting pins are secured with a small grub screw from the bottom.

  • Rear uprights assembly

New aluminum, black anodized and laser engraved uprights with 3 upper roll-center positions. Strong steel track-rods with L/R threading and strong ball joints to pre-set camber. Spring steel wheel-axles with large size bearings 8x16x5 and 13x19x4 with precision threaded aluminum wheel-hubs with +3 offset. Rubber dustcovers in the rear to protect the cvd system and keep the lubrication inside. Flanged wheel nuts to guarantee that you will not lose a wheel nut in a race.

  • Rear anti-roll bar    

The ball raced front anti-roll bar system, consist of a spring steel bend wire, which is guided through the diff-cases and runs in ball raced steel adaptors. The wire is comlinked to the lower suspension arm, with a captured adjustable threaded pivot ball, for very precise and low friction operation.

  • Wing mount and body mounts rear    

Composite rear wing, with strong nylon adjustable rear body mounts on wide body-support bridge located far enough to the rear, to support the bodies in best way.

  • Captured pivot pins and balls and bolted hinge pins  

All spring-steel hinge pins are either captured or bolted in place and made in spring-steel quality. This insures your chances to finish an hour long main event, while battling for the lead.  This relieves stress on the hinge pin when adjusting the kick up, or anti squat. Your pin is free to rotate to any angle without binding.

  • Shock absorbers big-bore 16mm  

Hard Teflon coated threaded shock bodies with 4mm shock-rods.  Black anodized aluminum screw on shock-tops with Serpent laser engraving.   Pre-load adjusters with O-rings inside.  Shocks use large diameter membranes and large diameter O-rings and bushings to create a super smooth and leak-proof package.  Large diameter pistons are held in place by a nut on the polished shock-rods tops. Open type spring retainer to let dirt out easy.

  • RCM shock springs

Short type color-coded shock springs are supplied for the 1st standard set-up Springs are grinded flat top and bottom, and checked individually for tension and length.

  • Compact gear differentials

Very compact gear differentials with very smooth metal sintered gears, and steel shaft. Perfect sealing case with special gasket and O-rings. Very light and durable outdrive cups in spring-steel.   Hardened spring-steel diff-coupler 13T with connector running in 2 oversized bearings 8x19x6 and ballbearing-13x19x4.

  • Front and rear cvd-sets  

Both front and rear captured drive shafts are being used with CVD system.  Durable yet light spring steel engraved drive shafts with hard steel pins.

  • Spring steel transmission parts

The front and rear thin but strong spring steel cardan shafts connect the differentials with the gearbox section.

Engine mount

Machined 7075 T6 aluminum engine mounts with side cooling fins.

  • Coil exhaust wire and aluminum mount    

The tuned pipe is securely fastened with the coil spring and aluminum holder. Helps aid in the front to back movement of the pipe when chassis flex occurs. Helps to prevent damage to your exhaust gaskets.

  • SL8 XLi  2-speed gearbox

SL8 gearbox comes straight from the Serpent 977-EVO 1/8 scale on road car. Very light and compact design. Centrifugal spring loaded shoe system with small aluminum bell and flange with one-way bearing. Durable composite 2-speed gears with smaller pitch.

  • 2-speed clutch-housing with screw-on gears    

Strong steel clutch-housing with precision machined threading, with hard coated aluminum screw on gears with smaller pitch.

  • 4-shoe clutch    

Full carbon 4 shoes clutch-set with medium type springs.  Easy to assemble with light and durable anodized aluminum flywheel.

  • 150cc fuel tank

Composite nylon fuel-tank with super sealing spring-loaded shock-cap, bronze sintered clunk type filter and splash-side guard.  Side features slots to mount the supplied tube-guiders.  Tank mounts to chassis on longer composite posts with integrated rubber buffers to allow some movement and reduce fuel-foaming. The clunk system will allow the engine to continue running when the car is up-side-down.

  • Oils and grease

The shock-oil, diff oil and some grease is supplied to meet the standard set-up.

  • Manual and set-up  

Full color online manual and USB stick version with easy to follow assembly steps, exploded views for easy spares ordering, a blank and standard set-up sheet for a good start set-up.

  • Decals  

Black and white promo body-decals, Serpent generic and Cobra GT ones.

  • Packing    

Parts are packed according to the steps explained in the manual.