Testing SME 4-2-1 NA headers & fixing the Racefix Parts Race car! (86 GR86 BRZ Headers tested)

Sydney Motorsport Engineering have developed an excellent NA header for the brand new 2.4L 2022+ GR86 and BRZ but how does it work on the older 2L cars? Thankfully the answer is a resounding yes! The SME 4-1 header was known to be one of the best headers for top end power and the new 4-2-1 heade not only beats it with top end performance, but it also provides a huge power and torque gain with over 25Nm available in the torque dip! BUY THE 4-2-1 HEADER HERE: https://www.racefix.com.au/shop-rf/p/... Checkout PVS tuning:   / pvsperformancetuning   Checkout SME:   / sydneymotorsportengineering   Checkout Racefix Parts:   / racefixx   Checkout SME Turbo Kits: https://www.racefix.com.au/shop-rf/sy...