-25%
Click to zoom in
SKU: 19738 | UPC: 690092178635
Vibrant Silicone Reducer Coupler 4.00in ID x 3.00in ID x 4.50in Long - Black
This Vibrant Performance aramid reinforced silicone transition hose coupler smoothly reduces from 4.00 inch ID to 3.00 inch ID over 4.50 inches for seamless connections in custom setups. It handles air intake systems intercooler piping and coolant lines with reliable performance across extreme conditions. Engineered for high boost applications it maintains flexibility and seal under pressure.
Key Features
- Aramid Reinforcement: Four layers of high temperature resistant aramid fabric between silicone provide superior burst strength flexibility and resistance to cracking under boost
- Temperature Range: Functions from -75 Degrees F to 392 Degrees F (-60 Degrees C to 200 Degrees C) for hot engine bays cold weather and track abuse
- Precise Sizing: 4.00in large ID to 3.00in small ID over 4.50in length with 0.240in wall thickness fits tight spaces in turbo inlets throttle transitions and piping
- Black Silicone Construction: Professional matte black finish resists UV ozone abrasion and weathering for long lasting appearance and function
- Service Compatibility: Rated for water coolant and air applications in performance plumbing ensures airtight seals without degradation
Product Notes
- Use constant tension spring clamps or T-bolt clamps rated for silicone sold separately for secure hold
- Inspect regularly and replace if exposed to fuel or oil as silicone is not compatible
- Compact design ships flat in protective packaging to arrive ready to install
Installation Notes
- Professional installation recommended.
- Lubricate with silicone safe spray apply clamps evenly torqued to 50 in-lbs for leak free seal
- Works with aluminum mandrel bent pipes stainless steel and plastic composites common in intakes
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| Universal | All | Custom Applications | Air Intake Intercooler Coolant Piping |
Why Choose Vibrant Performance?
- Proven in NHRA drag racing and street performance for decades
- Hand layered construction exceeds SAE J200 standards for durability
- USA manufactured with exact molds for consistent shape and wall thickness
Frequently Asked Questions
-
Q: Will this coupler work on my turbo intake setup?
A: Yes as a universal part it fits any 4in to 3in reduction needs like turbo compressor outlets throttle bodies or intercooler pipes on boosted vehicles -
Q: What material makes up the reinforcement?
A: High temperature aramid fabric similar to Kevlar layered between silicone plies for 100 PSI burst resistance and full flexibility -
Q: What warranty coverage applies?
A: Limited lifetime warranty against material and manufacturing defects when installed and used as intended for air water coolant
Shipping & Handling
- Method: UPS Ground USPS Priority
- Availability: In stock - ships same or next business day
- Packaging: Protective poly bag in 6in x 6in x 2in mailer
- Weight: 0.42 lbs
Air Intake Systems
Air Intake Systems, Cold Air Intakes & Performance Intake Parts Shop premium air intake systems, cold air intakes, short ram intakes, air boxes, intake components, intake elbows, mass air flow sensors, scoops, snorkels, recharge kits, silicone couplers, and intake hoses at Black Ops Auto Works. This collection is built for enthusiasts looking to improve airflow, throttle response, induction sound, horsepower potential, and under-hood performance across cars, trucks, SUVs, Jeeps, muscle cars, off-road builds, and supercharged HEMI platforms. Whether you are upgrading a daily driver, Dodge Charger, Dodge Challenger, Dodge Durango, Jeep Grand Cherokee, Jeep Trackhawk, Ram TRX, Ram RHO, Toyota Tundra, Chevy Silverado, Chevrolet Camaro, Corvette, BMW, Cadillac CTS-V, Honda, Hyundai, Infiniti, or a custom performance build, our Air Intake Systems collection includes parts designed for fitment, durability, and real-world performance. Air Intake Systems from Top Brands Shop trusted air ...
View Air Intake Systems Products
Silicone Couplers & Hoses
Shop premium silicone couplers and hoses at Black Ops Auto Works, your trusted source for silicone reducer couplers, straight hose couplers, 45 degree silicone elbows, 90 degree silicone elbows, transition elbows, hump hoses, T-hose couplers, and reinforced silicone hoses for performance, street, truck, and custom builds. Our collection is built for enthusiasts and fabricators looking to improve airflow, boost reliability, fluid transfer, heat resistance, and long-term durability. Whether you are building a cold air intake, intercooler piping system, turbo setup, supercharger system, coolant hose upgrade, or custom fabrication project, we carry high-quality silicone components designed for fitment, flexibility, pressure handling, and performance. Shop Silicone Couplers, Elbows & Reinforced Hoses At Black Ops Auto Works, we offer a wide selection of silicone couplers and hoses for air intake, charge pipe, coolant, and custom plumbing applications. Popular Silicone Couplers & ...
View Silicone Couplers & Hoses Products
Vibrant
Shop premium Vibrant Performance parts at Black Ops Auto Works, your trusted source for Vibrant exhaust components, resonators, mandrel bends, silicone couplers, hump hoses, AN fittings, PTFE hose ends, fabrication parts, fuel system fittings, and performance plumbing components. Vibrant Performance is known for producing high-quality exhaust fabrication and fluid transfer products engineered for fitment, durability, airflow, and race-ready reliability. Whether you are building a turbo setup, custom exhaust, intercooler piping system, fuel system, hot side charge pipe, or full race car, Vibrant products deliver the precision and performance serious builders demand. Shop Vibrant Exhaust, Fabrication & Performance Plumbing Parts At Black Ops Auto Works, we carry a wide selection of Vibrant Performance fabrication parts and plumbing components for street, race, drift, off-road, and custom builds. Popular Vibrant Product Categories: Exhaust Components & Resonators – Stainless ...
View Vibrant ProductsLet customers speak for us
Looks pretty nice
Looks pretty nice, pricing was good and the reinforcement is a big plus.
Randy H.
Black Ops Auto Works
I emailed customer service to inquire about when it would be shipped
I emailed customer service to inquire about when it would be shipped. They checked and emailed me with the answer. Customer service is A1
Ralph J.
Black Ops Auto Works
Installation was easy
Installation was easy. The price is good and it looks great on the truck.
Ralph J.
RHO Small Grille Badge
Looks as good as it fits
Looks as good as it fits,
zachary d.
Seibon 70-73 Datsun 240Z OE Carbon Fiber Hood
Nothing like it
I love it great sound and response
Luis P.
Legmaker Dodge Durango HEMI Short Ram CAI 2011-Present 5.7L
Car totally diferent with the whole kit
Car totally diferent with the whole kit. Ive stood next to wide bodies and my car gets more attention at times . Ive bought the kit twice already.
Ding D.
2015-2023 Dodge Charger Carbon Fiber Wind Splitters
Fantastic emblem! Exactly what I was looking for
Fantastic emblem! Exactly what I was looking for. Great quality emblem.
Jacobus S.
Direct Connection Black Metallic Fender Badge
Worked great for my aftermarket hood on my Chrysler 2023 300C
Worked great for my aftermarket hood on my Chrysler 2023 300C. Thanks
Robert G.
Windshield Washer Squirter Relocation Kit Universal
Easy to install and makes car sound even better
Easy to install and makes car sound even better love the winn
Tracy H.
Legmaker Challenger/Charger Hellcat Demon & Redeye Air Intake
Awesome customer support
Awesome customer support. Had multiple issues with fedex and these guys were excellent in helping me sort everything out. The drop springs are great too! I highly recommend
Anonymous
Swift Spec-R Lowering springs Jeep Grand Cherokee 2011-2021
100/100! perfect CF crafted cold air intake for 6
100/100! perfect CF crafted cold air intake for 6.4 jeep .. even makes my AWE exhaust sound even deeper and you cam here this thing sucking when accelerating even at normal speeds🥶
srt.boizzz
Legmaker 392 TH Short Ram Jeep Grand Cherokee SRT 2012-2021
