Ferrea Competition Plus Exhaust Valve - Honda Civic Type-R K20C1 Stock Size - Set of 8 - F2394P 3.75" to 4.0" we laser etch the fitment

we laser etch the fitment size and logos with a YAG laser

2021:Nissan:Altima:SR

Adjustable Gate Spacing allows a reduction from 5% to 40% narrower than stock on the '09-'11 Si and '07-'11 FD2/FN2 Type R and 10% wider to 30% narrower than stock on the '06-'08 Si

Also sold individually

Hawk 06-11 Audi A3 2

Ferrea Competition Plus Exhaust Valve - Honda Civic Type-R K20C1 Stock Size - Set of 8 - F2394P 3.75" to 4.0" we laser etch the fitmentFerrea Competition Plus Valves have built a reputation as the industry's most reliable extreme duty valve. To manufacture the valves we use special aerospace quality alloys, including the EV8 Z18, which provides high tensile strength. An exclusive two step slow forging process ensures proper grain flow and virtually eliminates any damage to thematerial structure. The valves are then heat treated and stress relieved over a 48 hour period, which is the