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Description
Join unequal pipe diameters with matched clamp retention
Wehrli Custom Fabrication WCF207-115 combines a black silicone reducer boot with one clamp sized for each end. The universal 4-inch-long connector is selected by measured pipe outside diameter and operating conditions rather than by a year-make-model application.
Key Features
- Straight reducing connector for unequal pipe diameters
- 3-inch inside diameter at the small end
- 3.5-inch inside diameter at the large end
- 4-inch overall boot length
- Black silicone construction with WCFab logo
- One 3-inch and one 3.5-inch T-bolt clamp included
- Universal dimension-based application
Fitment
| Application Type | Verified Requirements |
|---|---|
| Universal dimension-based | Requires mating tubes with 3-inch and 3.5-inch outside diameters and adequate space for a 4-inch-long straight reducer. Verify pressure, temperature, fluid or vapor exposure, clamp clearance, insertion depth, and surrounding-component clearance before installation. |
Specifications
| Detail | Value |
|---|---|
| Manufacturer Part Number | WCF207-115 |
| Product Type | Straight reducer boot and clamp kit |
| Boot Material | Silicone |
| Color | Black |
| Small-End Inside Diameter | 3 in |
| Large-End Inside Diameter | 3.5 in |
| Boot Length | 4 in |
| Clamp Type | T-bolt |
| Shipping Weight | 1 lb |
| Package Dimensions | 8 x 6 x 4 in |
| Warranty | 1 year |
| Fitment | Universal dimension-based |
What's Included
- One black 3-inch to 3.5-inch straight silicone reducer boot, 4 inches long, with WCFab logo
- One 3-inch T-bolt clamp
- One 3.5-inch T-bolt clamp
- Pipes, adapters, tools, sealants, and installation labor are not included
About Wehrli Custom Fabrication
Wehrli Custom Fabrication develops diesel-performance piping, intake, and replacement components from its Illinois facility. Its boot and clamp kits are cataloged by exact connection diameters and length so the adjoining pipes and installation environment must be measured before selection.
Related Parts
- No internal product is linked because adjoining pipes, adapters, and support hardware must be chosen from measured diameters and the verified operating environment.
FAQ
What is the WCF207-115?It is a black 4-inch-long straight silicone reducer boot supplied with matched 3-inch and 3.5-inch T-bolt clamps.
Does this kit fit a specific vehicle?No. It is a universal dimension-based connector and does not carry a year-make-model application.
What pipe sizes does it connect?It is intended for a 3-inch outside-diameter pipe at one end and a 3.5-inch outside-diameter pipe at the other.
How long is the reducer boot?The verified overall boot length is 4 inches.
Are both clamps included?Yes. The kit includes one 3-inch T-bolt clamp and one 3.5-inch T-bolt clamp.
Can it be used in every pressurized system?No. Confirm the exact pressure, temperature, medium, pipe-bead, and retention requirements of the complete system before installation.
Should sealant be applied to the boot?Use only installation products and procedures approved for the adjoining pipes and the intended service; the verified kit listing does not specify sealant.
What should be checked after installation?Inspect both joints for full insertion, even clamp seating, leaks, movement, heat exposure, abrasion, and contact after the first operating cycle.
Installation Instructions
- Measure both pipe outside diameters and confirm they are 3 inches and 3.5 inches before installation.
- Confirm the 4-inch boot length, pressure, temperature, fluid or vapor compatibility, and clamp clearance suit the complete system.
- Inspect and clean both pipe ends, removing oil, debris, sharp edges, and damage that could prevent sealing.
- Place the matching T-bolt clamp over each end of the boot and slide the boot fully onto both mating pipes.
- Align the reducer without twisting or placing side load on the silicone, then position each clamp behind the pipe bead where applicable.
- Tighten the clamps to the current component or system specification without cutting or distorting the boot.
- Pressure-test the connection as appropriate and reinspect both joints after the first heat and operating cycle.
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