Black Silicone Hose, 3 3/4 x 3 1/2 inch ID Straight Reducer

This black silicone reducer is just the right piece to reduce your 3 3/4" nipple to a 3 1/2" pipe.

AF9203-375-300 - Silicone Hose Reducer 90 Deg;

76mm 3 I D Black Silicone Hose

2.5in to 3in Silicone Reducer Straight Coupler Hose,Length 3,ID 2.5 to 3(63-76mm),4-Ply Reinforced Turbo/Intercooler/Intake Piping Reducer

OHOB-Cool 2.5 to 3 inch Silicone Reducer Straight Coupler Hose,Length 3(76mm),ID 2.5″ to 3″ (64-76mm),4-Ply Reinforced Turbo/Intercooler/Intake

HPS 3.25 - 3.5 (83mm - 89mm) 6 Long Silicone Straight Reducer Hose - BuildFastCar

Straight Step Down Reducer Performance Reduction Silicone Hose

Silicone Coupler

Blue Silicone Hose, 3 3/4 x 2 3/4 inch ID Straight Reducer

Silicone Hose Reducer Str Black I.D 1.25-1.00″ 32-25.4 4.5mm, 127mm L AF 9201-125-100 – Motorsport Accessories

Air Filters & Induction > Silicone Hose - Performance Warehouse