#6X-400. TH400 / TH350 Master Blaster Junior Converter, 10 1/2″ Billet, 800 HP.
” Master Blaster Junior ” Fits 400 / 350 transmissions. This is a 10 1/2 inch non-lock-up balanced converter with your choice of stall speeds from 2600 to 6000 RPM, bearing construction, furnace brazed fins, extra large balloon plate and a billet front cover. Rated at 800 horse power. Lower 60 foot times and improved quarter mile times, an average of 1/2 second reduction!