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Spectre 9781 Coupler Elbow - 4in. / 90 Degree (PVC) - Black
The Spectre 9781 is a 4-inch 90-degree PVC intake coupler elbow designed to connect two sections of 4-inch OD intake tubing at a right angle. Built from durable black PVC with a small bend radius, the 9781 fits into tight engine bay spaces where rigid aluminum elbows may not clear surrounding components. The kit includes two stainless steel worm gear hose clamps for a secure, leak-free installation. The 9781 is an ideal solution for completing 90-degree direction changes in cold air intake systems, airbox connections, or other air routing applications. Note: not suitable for pressurized turbo or supercharger outlets.
Features and Benefits
- 4-inch 90-degree PVC coupler for connecting 4-inch OD intake tubes
- Compact small bend radius fits into tight engine bay spaces
- Two stainless steel worm gear hose clamps included
- Flexible PVC accommodates minor misalignment between tube ends
- Black finish for a clean OEM-style underhood appearance
- Compatible with 4-inch Spectre intake tubes and most other brand components
- Not for use on pressurized charge piping (turbo or supercharger outlets)
Specifications
| Specification | Detail |
|---|---|
| Part Number | 9781 |
| Brand | Spectre Performance |
| Material | PVC |
| Color | Black |
| Coupler ID | 4 in. |
| Bend Angle | 90 Degree |
| Clamps Included | 2 x Stainless Steel Worm Gear |
| Fitment | Universal |
| Warranty | Limited lifetime |
What's Included
- 1 x Spectre 9781 PVC 90-Degree Coupler Elbow
- 2 x Stainless Steel Worm Gear Hose Clamps
Frequently Asked Questions
What is the inside diameter of the Spectre 9781?
The 9781 has a 4-inch inside diameter and connects two 4-inch OD intake tubes at a 90-degree angle.
Can I use the 9781 on a turbocharged or supercharged vehicle?
No. The 9781 PVC coupler is not rated for pressurized charge-pipe applications. Use a silicone coupler for pressurized systems.
Does the 9781 come with clamps?
Yes. The kit includes two stainless steel worm gear hose clamps for securing the coupler to each intake tube end.
How does the PVC material compare to silicone couplers?
PVC is a cost-effective option for non-pressurized naturally aspirated intake connections. Silicone couplers are preferred for pressurized or high-heat applications.
Is the 9781 compatible with 4-inch aluminum intake tubes?
Yes. The 4-inch ID accepts any 4-inch OD tube end, aluminum or otherwise.
What is the bend radius on the 9781?
The 9781 uses a small bend radius, making it more compact than standard radius couplers for use in tight engine bays.
Is the Spectre 9781 a universal fit?
Yes. It fits any 4-inch intake system requiring a 90-degree turn in a non-pressurized application.
Can I use the 9781 to connect an air filter to a straight tube?
Yes. The 9781 can connect a 4-inch filter neck to a 4-inch intake tube at a 90-degree angle where a straight connection is not possible.
Installation Notes
- Slide a hose clamp over each intake tube end before installing the coupler.
- Insert each tube end into the corresponding opening of the 9781 coupler.
- Position the coupler so both tube ends are fully seated inside.
- Move each hose clamp into position over the coupler ends on each tube.
- Tighten both clamps securely with a screwdriver.
- Start the engine and confirm there are no vacuum leaks at the connection points.
CALIFORNIA PROPOSITION 65 WARNING: This product can expose you to chemicals including lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, go to www.P65Warnings.ca.gov.
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