Designed for R304 SUS Exhaust series.
When attached to an exhaust tip, it reduces the exhaust noise by 3 to 5 db.
※ Not compatible for the previous generation C304 exhausts and Titanium exhausts.
※ Cannot be used for 70RR for DC5 / EP3
R304-**-**RR（Except for DC5 & EP3）
※ it might cause a damage to the exhaust with the back pressure (exhaust pressure) kept over a certain level. Please remove it on a race track or on a street for a driving with a high rev ragne.