Product Description
DIAMOND EYE 524520 is a universal 4.0" mandrel-bent 45° elbow built from durable aluminized steel for clean flow and easy fabrication on diesel or gas exhaust builds. One end is flared to simplify slip-fit assembly with common 4" tubing and components.
Fitment / Use
- Universal 4.0" exhaust systems (diesel or gas)
- Fabrication of downpipes, tailpipes, and tight-clearance turns
- One end flared to slide over 4" pipe for easier install and welding
Cross-Reference / Alternatives (Diamond Eye Only)
- 4" Stainless 45°: DIAMOND EYE 524521
- 5" Aluminized 45°: DIAMOND EYE 524525
- 4" Aluminized 90° L-Bend: DIAMOND EYE 529020
Specifications
| Manufacturer | Diamond Eye Performance |
| Part Number | 524520 |
| Size | 4.0" OD |
| Bend | 45° |
| Material / Finish | Aluminized steel |
| End Style | One end flared slip-fit |
| UPC | 841963118094 |
| GTIN | 00841963118094 |
| Shipping (box) | Approx. 17.5" × 4" × 4"; ~3.8 lb; ships as 1 piece |
| Prop 65 | ⚠️ Cancer and Reproductive Harm — See P65Warnings.ca.gov |
| Warranty | 1-Year defect (manufacturer) |
FAQ
Will this fit my truck?
This is a universal 4.0" elbow for custom exhaust fabrication. It is not vehicle-specific. Verify your system uses 4" tubing and confirm routing/clearance before purchase.
Is one end flared for a slip fit?
Yes. One side is flared to slide over standard 4" exhaust pipe, making mock-up and welding easier.
What material and finish is this?
Aluminized steel for corrosion resistance and value. For maximum corrosion resistance, see the stainless alternative 524521.
Is there a matching 90° option?
Yes — see the 4" 90° L-bend DIAMOND EYE 529020.
