Need a replacement catalytic converter for your 1978 Triumph Spitfire? MagnaFlow offers high-quality catalytic converters engineered for 1978 Triumph Spitfire sub-models and engine sizes. We combine efficient design and state-of-the-art manufacturing to meet or exceed required emissions standards. Select your 1978 Triumph Spitfire requirements and state vehicle registration to buy the best Spitfire catalytic converter online that fits your '78 Spitfire and meets your state’s emissions compliance.