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Spectre 97990 Universal 4in. OD Aluminum Tube Elbow - 90 Degree / 6in. Length
The Spectre 97990 is a polished aluminum 90-degree tube elbow with a 4-inch OD and 6-inch overall length, purpose-built for custom cold air intake systems, intercooler piping, and performance air routing applications. The sharp 90-degree bend in a compact 6-inch length makes the 97990 ideal for tight engine bay routing where space is limited but a full right-angle turn is required. Mandrel-bent construction ensures a smooth, unobstructed internal bore to maintain airflow velocity through the bend. Universal fit accommodates any 4-inch intake build.
Features and Benefits
- 90-degree bend in a compact 6-inch length for tight routing applications
- 4-inch OD pairs with standard intake tubing, silicone couplers, and PVC fittings
- Mandrel-bent aluminum construction for smooth internal bore and maximum flow
- Polished finish for a clean underhood appearance
- Lightweight aluminum construction reduces system weight
- Universal fit for custom intake and intercooler builds
- Compatible with MAF sensor bung installation if welded
Specifications
| Specification | Detail |
|---|---|
| Part Number | 97990 |
| Brand | Spectre Performance |
| Material | Aluminum |
| Finish | Polished |
| Tube OD | 4 in. |
| Bend Angle | 90 Degree |
| Length | 6 in. |
| Fitment | Universal |
| Warranty | Limited lifetime |
What's Included
- 1 x Spectre 97990 Aluminum 90-Degree Tube Elbow
Frequently Asked Questions
What is the OD of the Spectre 97990?
The 97990 has a 4-inch outside diameter and pairs with any 4-inch ID couplers or matching intake tubes.
How does the 97990 differ from the 97991?
Both are 4-inch 90-degree aluminum elbows. The 97990 has a 6-inch length while the 97991 is 16 inches long, making the 97990 better suited to compact installations and the 97991 to applications requiring a longer straight section.
Is the Spectre 97990 mandrel bent?
Yes. Mandrel bending keeps the internal diameter consistent through the bend, preventing the flow restrictions associated with crush-bent tubing.
Can I weld a MAF sensor bung onto the 97990?
Yes. The aluminum tube can be drilled and welded to accept a MAF sensor bung if your intake configuration requires in-tube MAF placement.
What couplers work with the 97990?
Any 4-inch ID silicone or PVC coupler will slide over the 4-inch OD tube. Spectre and third-party manufacturers offer a wide selection of compatible couplers.
Is this tube compatible with intercooler piping?
Yes. The polished aluminum and mandrel bend make the 97990 suitable for both intake and charge-pipe fabrication on turbocharged and supercharged applications.
Does the 97990 come with couplers or clamps?
No. The 97990 is the tube elbow only. Hardware is sold separately.
Is the 97990 a universal fit?
Yes. It is a universal component compatible with any 4-inch diameter intake or intercooler system.
Installation Notes
- Dry-fit the 97990 with all adjacent components before final assembly to confirm routing and clearances.
- Slide 4-inch ID couplers onto each end of the tube elbow.
- Connect to adjacent intake tubing and orient to the required direction.
- Position hose clamps over the couplers at each end.
- Tighten all clamps to prevent air leaks.
- Start the engine and verify normal operation with no vacuum or boost leaks.
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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