Product Description
DIAMOND EYE QC400-6 is a universal 4.0" quick-connect coupler kit that lets you swap exhaust sections fast and clean using V-band connections—no cutting, prying, or crushed slip joints.
WHAT'S IN THE BOX: six (6) CNC-machined 4" flanges and two (2) V-band clamps for making two serviceable joints in a 4" system.
FAQ: WHAT DOES THE 6-FLANGE / 2-CLAMP KIT DO?
It creates two V-band unions—ideal for replacing a muffler with straight pipe (or vice-versa) or adding a removable section for service. Many shops use this kit for quick configuration changes between street and race setups.
FAQ: WILL IT FIT MY TRUCK?
Yes, if you have a 4.0" OD exhaust system (diesel or gas). This kit is universal and not vehicle-specific; weld the flanges onto your 4" tubing where you want a serviceable joint.
FAQ: MATERIAL & DURABILITY?
Kit components are stainless steel for heat-cycle durability and corrosion resistance; designed for repeated clamp/loosen cycles without deforming the joint.
Fitment Details
- Tubing size: 4.0" exhaust systems (universal, weld-on)
- Typical use: quick muffler ↔ straight-pipe swaps; removable mid- or tail-sections; service access points
- Recommended configuration: two unions placed before/after the muffler or at other service points for tool-less section swaps
Cross-Reference / Related Kits
- QC400-3: 4" kit with 3 flanges & 1 clamp (single union)
- QC500-6: 5" kit with 6 flanges & 2 clamps (for 5" systems)
Specifications
| Brand | Diamond Eye Performance |
|---|---|
| MPN | QC400-6 |
| Kit Contents | Six 4" CNC flanges, two 4" V-band clamps |
| Material | 409 stainless steel (flanges/clamps) |
| System Size | 4.0" (universal weld-on) |
| UPC | 841963120219 |
| GTIN | 0841963120219 (UPC-A / GTIN-12) |
| Shipping Weight | ~4 lb |
| Shipping Dimensions | Varies by packaging |
| Country of Origin | USA |
| Prop 65 | No |
