OUR guiding principle in regulating vehicle modifications is safety - to ensure that the mechanical performance of the car is maintained; and that road safety, vehicle exhaust and noise emissions standards are not compromised ("When replacing an old car part is an illegal modification" by Mr Leslie Kuek, and "Review blanket law on modifications" by Mr Aidan Wee; Oct 23).
For instance, while in itself, the modification of an exhaust system does not directly affect the brakes or steering system, the latter may not be built to handle the increased horse power or speed.
Thus, such modifications would require the Land Transport Authority's (LTA) approval.
Modifications involving aftermarket exhaust systems are allowed, if they have undergone testing either by the vehicle manufacturer or independent test laboratories, and are certified to comply with internationally recognised standards on safety and emissions.
As of last month, we have approved 81 aftermarket exhaust systems.
Similarly, high performance cars such as Ferraris and Lamborghinis, which come with a factory-fitted exhaust system, are allowed as the exhaust is specifically manufactured and designed for the vehicle and complies with the requisite safety and exhaust noise/emissions standards.
For older vehicles, where the original parts are no longer available, the LTA will consider allowing the use of a customised exhaust system, or alternative parts, based on a case-by-case basis.
The list of modifications is not exhaustive.
Vehicle owners can write in to the Vehicle Engineering Division of LTA at 10 Sin Ming Drive, Singapore 575701, or call our officers at 1800-225-5582 for further assistance on vehicle modifications.
Helen Lim (Ms)
Director, Media Relations & Public Education
Land Transport Authority