Shipping Estimate
USA
- USA
- CAN
- USA
- CAN
Ships within 48 hours · Estimated delivery Jul 8 - Jul 13
Promo Codes Available:
For Your Every Summer RSVP, with Code: SUMMER15
Description
80 Percent Over Early 5.9 Fuel Injector Each New Core Charge Applies Of 150 S&S DieselEarly 5. 9 Cummins Injectors. All prices listed are for full sets of injectors. S&S Upgrade Benefits SAC nozzles for all sizes (except TorqueMaster) Proprietary nozzle honing process for clean and consistent holes Nozzles flow matched to 1 percent variance per set, using OE standards Viscor SAE J967 40 degrees C 100 bar Injectors flow matched to 3 percent variance per set Viscor SAE J967 40 degrees C 4 different pressure energizing points per injector
Early 5.9 Cummins Injectors. All prices listed are for full sets of injectors.
S&S Upgrade Benefits
- SAC nozzles for all sizes (except TorqueMaster)
- Proprietary nozzle honing process for clean and consistent holes
- Nozzles flow-matched to 1 percent variance per set, using OE standards
- Viscor SAE-J967
- 40 degrees C
- 100 bar
- Injectors flow-matched to 3 percent variance per set
- Viscor SAE-J967
- 40 degrees C
- 4 different pressure/energizing points per injector
- Injection profiles (rate shape) aligned
- Injector build spec custom-matched to nozzle flow rate for each size
- 250 percent (3700 cc/min) and up feature internal body modifications
- Increased nozzle flow slows down the open/closing time
- Body modifications improve the injection rate shape
Options
- Brand new or Bosch remanufactured bodies available
- We only use reman bodies direct from Bosch for quality purposes, which differ from Bosch-certified remans
- The industry has adopted a percent increase in nozzle flow over stock as the sizing convention
- Available sizes: TorqueMaster, 20 percent, 40 percent, 60 percent, 80 percent, 100 percent, 150 percent, 200 percent, 250 percent, 300 percent, 350 percent, 400 percent, 450 percent, 500 percent
Details:
- Engine Manufacturer: Cummins
- Liter: 5.9
- Cylinders: 6
- BlockType: L
- Fuel Type: Diesel
- CID: 359
- Engine Bore Inches: 4.02
- Engine Bore Metric: 102
- Engine Stroke Inches: 4.72
- Engine Stroke Metric: 120
- Size: 80 Percent Over
- Condition: New
- Sold As: Set
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.5 ★★★★★
Based on 2108 reviews
Sort
Product Reviews
★★★★★ 3
Decent Look, But Sizing and Shrinkage Are Dealbreakers
Size: Medium, Color: White
Product: U.S. Polo Assn. Men’s Classic Polo Shirt
Used for: 5 and a half months
Key Features:
– Clean, classic polo style with a decent fit (visually)
– Breathable and lightweight for casual wear
– Appears durable and holds up in the wash
Ratings:
Quality:
The shirt feels alright and seems to hold up after regular washing. That said, it shrinks noticeably, and the sizing already feels off to begin with.
Rating: 4/5
Performance:
It’s wearable, but nothing exceptional. The fabric is fine for casual use, but the sizing was a big issue—I usually wear a medium, and this felt like an extra small. I even passed it on to someone smaller than me and they found it tight too.
Rating: 3/5
Value:
It’s reasonably priced, but there are definitely more comfortable and better-fitting polo shirts out there in the same price range.
Rating: 3/5
Pros:
– Easy to wash and care for
– Seems durable over time
Cons:
– Shrinks badly in the wash
– Sizing runs very small and feels inconsistent
Summary:
The U.S. Polo Assn. Classic Polo Shirt might work if you size up significantly and don’t mind a snug fit. It looks decent and holds up to washing, but the shrinking and poor sizing really hurt the overall experience. If comfort and a reliable fit matter to you, there are better options available for a similar price.
Overall Rating: 3/5
Disclaimer: This review is based on my personal experience using the product. I'm not an expert—just sharing my honest thoughts to help others make an informed decision.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on July 22, 2025
★★★★★ 5
Nice shirt for the money
Size: Medium, Color: Heather Dark Gray
The shirt fits nicely. Seems to be of good quality.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 8, 2026
★★★★★ 5
Good product as advertised
Size: Large, Color: West Blue
Bought many of these. Look good and fit true to size for the price
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 25, 2026
★★★★★ 5
Good shirt
Size: Small, Color: Black
Very nice shirt, I usually wear medium but I had to get one size smaller. The small men size fits my collar great but the dryer might shrink it.
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Reviewed in the United States on May 5, 2026
★★★★★ 4
It’s not Polo but a good shirt
Size: X-Large, Color: White
I too thought it was Ralph Lauren Polo but found out that it was US Polo Association. It is a bit boxy but fits well. It is a good quality shirt and a good value for the price. Runs true to size.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 7, 2026
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