S&B CAI-GT500-20D JLT Cold Air Intake Dry Filter 2020-2021 GT500 No Tuning RequiredIntake Tube. Computer Designed and HUGE! We were able to Design this tube to use all of the available space, the tube is 6 inch at the filter end and smoothly tapering down to 4. 5 inch at the Throttle body side. Keeping the Intake Tube a half inch bigger than the stock throttle body in anticipation of aftermarket offerings. Heat Shield The rotational molded plastic Heat Shield blocks engine heat at idle and low speed. The Intake Tube passes through