Product Details
The Flexfab 5508-250 is a green silicone, 2-ply polyester + helical wire hose engineered for demanding engine environments. It resists hardening, cracking, cold leaks, aging, and many chemicals, making it a durable, long-lasting solution for diesel, automotive, marine, agricultural, and industrial cooling systems.
Performance & Construction
| Construction | Green silicone, 2-ply polyester + helical wire |
| Inside Diameter | 2.50″ (64 mm) |
| Outside Diameter | 2.92″ (74 mm) |
| Actual Burst Pressure | 350 PSI |
| Working Pressure | ~117 PSI (1/3 of burst) |
| Temperature Range | -65F to +350F |
| Wall Thickness | .130″/.180″ |
| Standards | SAE J20 R2 Class A |
| Origin | Made in USA |
Why this hose
- Green silicone, 2-ply polyester + helical wire — durable construction engineered for demanding cooling-system service.
- -65F to +350F range — stays flexible in cold and handles under-hood heat without hardening or cracking.
- Resists hardening, cracking, cold leaks, aging, and many chemicals — long service life where ordinary rubber fails.
- Meets SAE J20 R2 Class A — engineered to recognized heavy-duty hose standards.
Frequently asked questions
Flexfab 5508 Series — Complete Size Chart
Every size in the series. Click a part number to open that product.
| Part | ID (in) |
ID (mm) |
OD (in) |
OD (mm) |
Actual Burst |
SAE | TMC | Weight (lb/ft) |
|---|---|---|---|---|---|---|---|---|
| 5508‑050 5508‑050X12 |
0.50″ | 13 | 0.92″ | 23 | 600 PSI | R2 – N/A | — | 0.17 |
| 5508‑062 5508‑062X12 |
0.63″ | 16 | 1.05″ | 27 | 600 PSI | R2 – N/A | — | 0.21 |
| 5508‑075 5508‑075X12 |
0.75″ | 19 | 1.17″ | 30 | 600 PSI | R2 – N/A | — | 0.23 |
| 5508‑087 5508‑087X12 |
0.88″ | 22 | 1.30″ | 33 | 550 PSI | R2 – N/A | — | 0.26 |
| 5508‑100 5508‑100X12 |
1.00″ | 25 | 1.42″ | 36 | 550 PSI | R2 – N/A | — | 0.3 |
| 5508‑125 5508‑125X12 |
1.25″ | 32 | 1.67″ | 42 | 525 PSI | R2 – N/A | — | 0.36 |
| 5508‑150 5508‑150X12 |
1.50″ | 38 | 1.92″ | 49 | 500 PSI | R2 – N/A | — | 0.43 |
| 5508‑175 5508‑175X12 |
1.75″ | 44 | 2.17″ | 55 | 475 PSI | R2 – N/A | — | 0.51 |
| 5508‑200 5508‑200X12 |
2.00″ | 51 | 2.42″ | 61 | 450 PSI | R2 – N/A | — | 0.56 |
| 5508‑225 5508‑225X12 |
2.25″ | 57 | 2.67″ | 68 | 400 PSI | R2 – N/A | — | 0.65 |
| 5508‑250 5508‑250X12 |
2.50″ | 64 | 2.92″ | 74 | 350 PSI | R2 – N/A | — | 0.74 |
| 5508‑275 5508‑275X12 |
2.75″ | 70 | 3.17″ | 81 | 325 PSI | R2 – N/A | — | 0.79 |
| 5508‑300 5508‑300X12 |
3.00″ | 76 | 3.42″ | 87 | 300 PSI | R2 – N/A | — | 0.85 |
| 5508‑350 5508‑350X12 |
3.50″ | 89 | 3.92″ | 100 | 275 PSI | R2 – N/A | — | 1.09 |
| 5508‑400 5508‑400X12 |
4.00″ | 102 | 4.42″ | 112 | 250 PSI | R2 – N/A | — | 1.19 |
| 5508‑600 | 6.00″ | 152 | 6.42″ | 163 | 125 PSI | R2 – N/A | — | 1.84 |
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