Civic... 
Header (EG/EK D15/D16)
Model: EG-EK B16 engineDesigns:
1)4-2-1: 38mm-42mm-60mm;increase median power power, improved drivability
2)4-1: 42mm-63mm;Maximize top end power output.
Header (EG/EK B16)
Model: EG-EK B16 engineDesigns:
1)4-2-1: 38mm-42mm-60mm;increase median power power, improved drivability
2)4-1: 42mm-63mm;Maximize top end power output.
Header (EJ K17)
Models: 1.7LDesigns:
4-1: 42mm-70mm; short runner big pipe diameter; optimised for mid-top power output.
Cat-Back System (EG)
Model: EG Hatch Back and SedanDesigns:
1)Cannon Rear Muffler: 60mm pipe diameter; Maximum Power;Racing Sound
2)Twin Loop Rear Muffler: 60mm pipe diameter; Maximum Power;Lower Sound output than Cannon muffler;No obvious exhaust noise from cabin on low and mid rpm;Quicker throttle response
Cat-Back System (EK)
Model: EG Hatch Back and SedanDesigns:
1)Cannon Rear Muffler: 60mm pipe diameter; Maximum Power;Racing Sound
2)Twin Loop Rear Muffler: 60mm pipe diameter; Maximum Power;Lower Sound output than Cannon muffler;No obvious exhaust noise from cabin on low and mid rpm;Quicker throttle response
Cat-Back System (EJ)
Model: EJ Hatch Back and SedanDesigns:
Cannon Rear Muffler: 60mm pipe diameter; Maximum Power;Racing Sound
Hi-Flow Cat
Options:1)Hi-flow honey comb ceramic substrate,550cfm+ (600hps+);
2)Hi-flow metallic substrate:700cfm+ (800hps+),long durability




