As far as modifications go, many do not have any legal barriers. Meaning, RTO does not recognise most, and are technically permissible.
Mechanical mods are allowed, provided;
1) You do not alter the original cc.
2) You meet the current emission norms.
3) The engine number/EIN, gearbox number, remains the same as R/C.
4) Noise levels do not go above permissible thresholds.
5) All dimensions remain the same as factory spec.
Which means you can go for the following alterations, legally.
1) Profiled cams.
2) Upgraded ECMs.
3) Cat-back exhaust systems. Full free flow and headers might cause PUC hampering and noise problems. Cat-back systems allow maximum de-restriction for road use.
4) Any modifications to the ignition system, including high-tension coils (such as MSD) spark plugs, etc.
5) Fuel systems, upto FPRs, injectors, associated wiring and plumbing. Alteration of tank, reinforcement/replacement not allowed.
6) Race/modified clutches and gear ratios- gearbox housing should not be altered.
7) Forged pistons, valves, etc. As long as effective engine displacement remains the same. Controlling the noise levels and optimising engine breathing is a daunting task.
8) There's no provision for forced induction. Since turbocharging does not alter the cubic capacity, technically it's fine to boost your car (the 1.4 multiplication factor is applicable for race regulations, not road use). Same case for NOS. Illegal in most countries for road use and race, NOS is relatively a new concept in India, and there are no RTO regulations preventing it's use. The only possible loophole is the classification of NOS as fuel, in which case, it is illegal to run the engine other than that specified by the manufacturer (petrol/diesel).
9) Suspension mods are ok, provided you do not change the track and offset. Which means sway bars, strut braces, enhanced dampers etc. are technically legal.
10) Larger than factory spec rims/wheels/tyres illegal. Which means running 15 inchers when the R/C specifies 14" is illegal.
As far body/exterior modifications go;
1) No change in manufacturer specified chassis/body frame designs, unless prior permission is obtained from RTO. Which means spoilers, skirts, and modified bumpers can be fitted, so long as the ground clearance and overall width/length is not affected, as per factory spec.
2) Factory paint/colour only. You can repaint the car in any shade, so long as the colour is factory spec. For example, deep silver to moon silver, etc. RTO notification is required for change in colour, for example, red to yellow.
3) Graphics/stickers that can be classified as "distracting" is illegal. No logos/stickers allowed on the front or rear windshield.
4) No additional foglamps or spot lamps allowed in city. Usage of high beams in city is illegal too. Xenons are ok, provided it emits white light with a yellowish tinge. Blue, pure white or any other colour is illegal.
5) Strobes and neons are illegal.
6) Shrill horns, musical horns, air horns are illegal in city. Air horns are permissible on the highway.
7) Heavy window tints.
8) Reversing horns.
These are most of the technical aspects. There are probably a lot more, but these cover the aspects of our road-use. |