Holeshot lists Vortex 4-into-1 systems for Sabres, Magnas, and Interceptors. Chrome systems for Sab/Mags are $369-$389, and black ceramic finish ones are $379-$399. They are made by MAC and appear to be the same ones sold by MAC for somewhat lower prices. Dale Walker recommends installing a Dynojet Stage I kit with these systems. As of this writing, (?) Kerker still makes a chrome 4-1 system for Magnas, which is listed by DK (over $500). Unfortunately both have noise levels >99dB and are sold for closed course (off-road) use only. One list member who tried both systems for his Sabre reports that (1) the sound of the Kerker is better than that of the Vortex, (2) the Kerker appears to be better made, since the chrome on the Vortex system quickly yellowed, and (3) MAC apparently has stopped making the ceramic coated systems. Slip-on replacement mufflers are available from Holeshot, DK, et al.