What You're Actually Buying
This is a straight piece, not molded - no bends, no humps, just a 3-foot stick of 1.75" ID silicone hose you cut down to whatever length your setup needs. 4-ply reinforcement means it's built to handle coolant system pressure and heat cycling, not some thin-wall garden hose knockoff.
Kenworth and Peterbilt both used variations of this straight stock in radiator-to-engine runs and charge air piping on a range of models. Because it's straight and cut-to-length, exact application isn't as picky as a molded hose - the ID and wall thickness are what matter most.
Silicone runs cooler-tolerant and lasts longer under heat than standard rubber hose, which is why it shows up as the upgrade pick even where the original spec was rubber.
Why These Numbers Cross
D10302508 and D1030-2650 both trace back to Kenworth's hose numbering for this ID and ply spec - the dash number variations are just how Kenworth's system labels length/cut variants of the same base part. F02504S352, C40-175X36, and 561.09175 are the aftermarket manufacturer part numbers for hose built to the same 1.75" ID and 4-ply spec.
Since this is straight stock cut to length, the main things to verify are ID size (1.75" here), wall ply count, and overall stick length you need. There's no arm, spline, or drum sizing to worry about like you'd have on a brake or clutch part - it's simpler, but don't assume every 1.75" hose on the shelf has the same ply rating or temp spec.
Always check the number stamped or printed on the old hose, or pull it by VIN through Kenworth/Peterbilt parts lookup, before you order. Straight hose is forgiving on fit, but not on pressure rating if you undersize the ply count for a turbo or high-pressure coolant application.
Ordering From Us
We stock this at the Tacoma counter - if you're local, call ahead and we'll have it cut and bagged for will-call same day. If you're not in the area, it ships nationwide and usually gets out same or next business day.
6+ month warranty on the hose itself. If it splits or fails from a manufacturing defect in that window, bring it back or call us - we'll sort it. We're not going to tell you it's a guaranteed fit for every Kenworth or Pete out there, because straight hose specs shifted across model years and options.
When in doubt, measure the old hose ID and count the plies if you can see the cut end, or just read us the number off it over the phone. That's the fastest way to make sure you're not stuck with a piece that's close but not quite right.
D10302508 Cross-Reference & Interchange Numbers
These manufacturer and aftermarket numbers commonly cross-reference to D10302508. Use them to identify the part — then confirm the exact fit by VIN or the number stamped on your old unit before you order. An interchange is a starting point, not a fitment guarantee.
| Brand / Line | Cross-Reference Numbers |
|---|---|
| KENWORTH | D1030-2650 |
| Aftermarket | F02504S352, C40-175X36, 561.09175 |
| BrandY | OEM123 |
| BrandZ | OEM456 |
Frequently asked questions
Does F02504S352 fit my Kenworth T680?
Likely, if your T680's coolant or CAC line calls for a 1.75" ID 4-ply straight hose - but Kenworth ran different hose specs depending on engine and cooling package across T680 model years. Check the number on your old hose or confirm by VIN before ordering.
Is this the same as the Kenworth D1030-2650 hose?
Same spec - 1.75" ID, 4-ply straight silicone. D1030-2650 is Kenworth's part number for what's essentially the same cut-to-length hose stock as D10302508. Different dash number, same hose.
Can I use this on charge air piping instead of just coolant?
4-ply silicone hose like this is usually fine for both coolant and lower-pressure CAC connections, but if you're running high boost pressure, check your OEM spec sheet or ask us - some CAC applications call for higher ply count or a reinforced wire-helix hose instead.
Not sure it fits? We check before you pay.
Run your VIN and we’ll match parts to your exact truck, or call the counter — a person who knows trucks verifies fitment by OEM number before the order ships. No wrong-box returns.
More cross-reference guides
Need the part, not just the reading?
Every part below is a Premium Quality aftermarket Direct Replacement with published OEM cross-reference numbers, a 6+ month warranty and same-business-day shipping from Tacoma, WA. Not sure it fits? Run your VIN — or call and a person who knows trucks will verify fitment before you pay.