Individual coilpacks / coil on plugs / COPs: Using the 4 unique coils from either a 1ZZ-FE or possibly of the NZ series engines this negates the need for any igniter(s), spark plug prospects, distributor cap plus a rotor button. This is certainly how the SQ Engineering AE86 is tuned https://toyota-4age-engine-for-sa80099.blogstival.com/53542072/5-essential-elements-for-4age-blacktop-for-sale