Genuine HJS Tuning catalytic converter cores for replacement/upgrade of restrictive factory cats. This is an individual catalyst; welding required
HJS has more than 30 years of experience and expertise in the field of exhaust-gas aftertreatment. For 10 years, we have been engaged in the development, production and marketing of HJS catalysts, downpipes and exhaust systems for tuned passenger cars. We regard ourselves as partners for our customers, who try to do everything to help them to be successful.
Thanks to our innovative technologies, the excellent quality of our products and our customer-oriented approach, we at HJS enjoy a high level of market acceptance. At the same time, we are making an important contribution to protecting mankind and the environment.