Product Description
DIAMOND EYE 420065 is a universal 4.0" slip-fit stainless Y-pipe built from T409 for corrosion resistance and strong weld integrity. Use it to merge dual 4" sections or to split a single 4" run while maintaining smooth, low-restriction flow in custom diesel exhaust builds.
FAQ: WHAT MATERIAL IS IT?
T409 stainless steel with a natural finish. It balances corrosion resistance with durability and weldability for daily-driven and heavy-use trucks.
FAQ: WILL IT FIT MY TRUCK?
It’s a universal 4.0" slip-fit Y connector. If your system uses 4" tubing, this will integrate with standard 4" components. Measure before ordering and mock-up for best fitment.
FAQ: DOES IT INCLUDE CLAMPS?
No. This listing is the Y-pipe only. Re-use your existing clamps or add new 4" band/V-band hardware as needed.
Fitment Details
- Tubing size: 4.0" (universal slip-fit)
- Use cases: Merge dual 4" sections into one, split 4" into dual, or build custom cat-back/turbo-back systems
- Material: T409 stainless steel, natural finish
Cross-Reference / Companion Diamond Eye Parts (on CPP Diesel)
- DIAMOND EYE 524521 — 4" 45° Stainless Elbow
- DIAMOND EYE 529021 — 4" 90° Stainless Elbow
- DIAMOND EYE 321099 — 2.5" Aluminized Crossover (for custom merges)
Specifications
| Brand | Diamond Eye Performance |
|---|---|
| Part Number (MPN) | 420065 |
| UPC | 841963116809 |
| GTIN | 0841963116809 (UPC-A) |
| Material | T409 stainless steel, natural finish |
| Connection | 4.0" slip-fit (universal) |
| Shipping Weight | ~5 lb |
| Package Dimensions | 12" x 8" x 8" |
| Prop 65 | WARNING: Cancer and Reproductive Harm — www.P65Warnings.ca.gov |
| Warranty | 6-Year (Diamond Eye Performance) |
| Country of Origin | Made in the USA (per distributor listings) |
