Precision Angle Without the Guesswork
Custom exhaust and turbo plumbing lives or dies on clean bends. This Stainless Bros mandrel bend gives fabricators a factory-precise 90 degree turn in 1.88 inch tubing with a tight 1D radius, so tight packaging jobs and header collector routing stay smooth instead of kinked. Built from 304 stainless in 16 gauge (.065 inch) wall thickness, it holds its shape through the welding process and resists work hardening better than cheaper bends on the market.
Key Features
- Mandrel formed for a constant, unrestricted inner diameter through the full bend
- 304 stainless steel construction resists corrosion and high exhaust gas temperatures
- 16 gauge (.065 inch) wall thickness for durability without excess weight
- Tight 1D bend radius suited to tight engine bay and undercarriage routing
- No leg design leaves both ends open for custom length cutting
- TIG weld ready surface finish for clean fabrication welds
Specifications
| Detail | Value |
|---|---|
| Manufacturer | Stainless Bros |
| MPN | 601-04856-3100 |
| UPC | 601-04856-3100 |
| Material | 304 Stainless Steel |
| Diameter | 1.88 inch |
| Bend Angle | 90 Degree |
| Bend Radius | 1D |
| Wall Thickness | 16 Gauge (.065 inch) |
| Leg Length | No Leg |
What’s Included
- 1 x Stainless Bros 1.88 inch 1D 90 degree 16 gauge no leg mandrel bend
About Stainless Bros
Stainless Bros builds mandrel bends, weld fittings, and exhaust components engineered for fabricators who need consistent wall thickness and true roundness through every bend. Their 304 stainless components are a staple in custom turbo plumbing, header, and downpipe builds where fit and finish matter as much as strength.
FAQ
What is the 601-04856-3100?
It is a Stainless Bros 1.88 inch diameter mandrel bend with a 90 degree angle, 1D bend radius, and 16 gauge 304 stainless steel wall construction with no leg length on either end.
What tubing diameter does this bend fit?
This bend is sized for 1.88 inch outer diameter tubing, a common size for turbo downpipes, header collectors, and mid pipe fabrication.
What does 1D bend radius mean?
1D radius means the centerline radius of the bend equals one tube diameter, producing a tighter turn than a 1.5D radius bend, useful when packaging space is limited.
Why does it have no leg length?
A no leg mandrel bend ships with straight cuts at both ends of the bend itself, giving fabricators full control to weld in custom straight sections to match their exact routing.
What wall thickness is this mandrel bend?
It is built from 16 gauge material, which measures approximately .065 inch thick, providing a durable balance of strength and weight for exhaust fabrication.
Is this bend suitable for turbo downpipe fabrication?
Yes, the 1.88 inch diameter and tight 1D radius make this bend a common choice for turbo downpipe and header collector routing where space around the turbo is limited.
Can this mandrel bend be welded to other exhaust components?
Yes, the 304 stainless construction and clean surface finish are suited for TIG welding to other stainless tubing, flanges, and fittings during custom fabrication.
Does this bend resist rust and corrosion?
Yes, 304 stainless steel provides strong resistance to rust and corrosion compared to mild steel bends, which is why it holds up well in exhaust and turbo plumbing applications exposed to heat cycling and moisture.
Install Instructions
- Measure and mark the required leg lengths for your specific routing before cutting
- Cut straight sections to length using a tubing saw or cutoff wheel
- Dry fit the bend in place to confirm angle and clearance before welding
- Clean all mating surfaces with a stainless prep solution to remove oils and residue
- TIG weld the bend to adjoining tubing sections using matching 304 stainless filler wire
- Inspect welds for full penetration and check for exhaust leaks after installation
