replacement parts, must be stock. Other restrictions in the category are that: Spoilers must stay within the width of the vehicle. Brakes must be stock dimensions; no swaps from other models of same make are allowed. Vehicles must retain OEM parts (ac/navigation/heater) A functioning car audio system must be in place. A 6-point roll cage with 4-point harness must be in place (same as that of D1GP). Restriction of engine swaps from other model into other model, as S15 Silvia Spec-S to Spec-R specification (SR20DE→SR20DET) may be permitted but a RB26DETT into an HR32 Skyline GTS-t is not unless the model is a BNR32, nor even is converting an AE85 to AE86 is permitted. Engines from other manufacturer's car (e.g. Darren McNamara's 13B-REW powered AE86) are not permitted as well. A bolt on turbocharger or supercharger is permitted, the engine in the car can be determined by the VIN plate D1 Lights D1 Street Legal is replaced by D1 Lights started from 2018, unlike D1 Street Legal the car now must be a competition only car and no longer street registered. The safety of the series is also increased due to a spotter being killed due to the wheel from car coming loose ahead of the spotter area during a practice session in the final round of 2016 D1 Street Legal. This led to the round being cancelled completely and the D1 Street Legal was not continued in 2017 The series kicked off with a pre-season event at Nikko Circuit with the series started the first round in Maze Circuit with Daisuke Saito became the first winner of D1 Lights, the first series champion is Junya Ishikawa who graduated to D1GP the following year while Naoki Nakamura who won twice regained his D1GP license and also graduated to D1GP. In 2019 for the first time D1GP and D1 Lights were held in same venue at same weekend at Autopolis with both series held its series finale. this feat was held again the following year twice with the season opener and once again in Ebisu West. Like its parent series every round is live streamed on D1's official YouTube channel D1 National Series During the 2005 exhibition event at Silverstone, a domestic series was announced with a plan to run the UK round as part of the world series for the following year, though plans for a point scoring round at