Shipping Estimate
USA
- USA
- CAN
- USA
- CAN
Ships within 48 hours · Estimated delivery Jul 14 - Jul 19
Promo Codes Available:
For Your Every Summer RSVP, with Code: SUMMER15
Description
Dinan F9x X3M/X4M Foundation Package (F) F9X-X3MX4M-F-BDinan F9x X3M X4M Foundation Package (F) Foundation packages represent the most direct path to increased power while retaining drivability and safety. The combination of Dinan modifications work harmoniously with one another and offer a balanced blend of enhanced engine efficiency, improved acceleration and increased power to go along with a tasteful high performance look and unmistakable Dinan sound. Whether you start with the base Foundation package
Dinan F9x X3M/X4M Foundation Package (F)
Foundation packages represent the most direct path to increased power while retaining drivability and safety. The combination of Dinan modifications work harmoniously with one another and offer a balanced blend of enhanced engine efficiency, improved acceleration and increased power to go along with a tasteful high performance look and unmistakable Dinan sound. Whether you start with the base Foundation package that includes the core hardware building blocks (intake and exhaust), or opt for packages that further enhance your vehicles power output and abilities you will be well on your way to an elevated experience.
Features:
- Maximum gains of +8 HP and +7 lb-ft of torque (Exhaust + Intake)
- Smoother, louder and sportier sound (Exhaust + X-Pipe)
- 8-pounds lighter than the stock for an improved power- to-weight ratio (Exhaust + X-Pipe)
- Computer controlled exhaust valves are retained and limit noise during low-speed driving and open fully during high-load conditions (Exhaust)
- Deletes resonator between the catalyst and rear muffler for increased volume (X-Pipe)
- Reduced intake restriction for greater flow that allows increased turbo efficiency and greater power potential on modified builds (Intake)
- Improved throttle response (Intake)
- Integrated carbon fiber engine cover for unmatched under hood visual appeal (intake)
- 7 points towards the illustrious Dinan deck lid badge
Specs:
| Brand | Dinan |
|---|---|
| Emission Code | 7 |
| Labor Time (Hours) | 6 |
| Product Type | Foundation Package |
| Tip Finish | Black Ceramic Coated |
| Warning | California Proposition 65 |
| Warranty | Dinan Factory Matching (4yr/50k) Warranty |
Application:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2020-2025 | BMW | X4 | M |
| 2020-2025 | BMW | X4 | M Competition |
| 2020-2024 | BMW | X3 | M |
| 2020-2024 | BMW | X3 | M Competition |
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
4.2 ★★★★★
Based on 483 reviews
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Product Reviews
★★★★★ 5
Comfortable Water‑Repellent Summer Shorts That Still Look Casual and Neat
Size: XX-Large, Color: Dark Grey
I find these TACVASEN 7 Inch Casual Twill Shorts very comfortable to wear for warm weather. The polyester twill fabric feels light against the skin and does not trap heat, which makes them a good option for summer days or humid climates. The material also behaves like a water‑repellent, quick‑dry fabric, so light splashes or a bit of sweat do not linger long, and the shorts dry fairly fast instead of staying damp.
The overall look is more refined than basic athletic shorts, which I appreciate. The 7‑inch inseam, flat front style, and elastic waistband with drawstring give them a casual, everyday look that can still pass for more polished casual wear if you pair them with a polo or a clean t‑shirt. They do not look sloppy, so they work for running errands, casual outings, or relaxed social situations, not just for the beach or lounging.
In terms of construction, the stitching on my pair is nicely done, with no loose threads or obvious defects on the seams or hems. The shorts include two slant pockets and one back pocket, and one of the front pockets has a hidden zipper pocket inside, which is handy for keeping small items like cards or coins more secure without changing the outside look of the shorts. The elastic waistband and drawstring make it easy to dial in the fit without feeling tight.
Based on my experience, these shorts would be suitable for a variety of uses such as casual walks, light outdoor activities, beach days, or as comfortable everyday summer shorts that still look presentable enough for casual gatherings. If you want something breathable, quick drying, and a bit more polished than pure gym shorts, these are a solid option.
I received this item for free through the Amazon Vine program and I personally evaluate what I receive. I also pay taxes, Social Security and Medicare so I do not treat this as mindless ordering of products I will not use or fully test.
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Reviewed in the United States on April 19, 2026
★★★★★ 5
Perfect Summer Shorts for Everyday Wear
Size: Large, Color: Dark Grey
These turned out to be one of those purchases that will become part of the regular summer rotation. The fit is excellent, the fabric feels lightweight without feeling cheap, and they’re extremely comfortable in warm weather.
What I like most is that they strike a really nice balance between casual and polished. They don’t look like gym shorts, but they’re just as comfortable. The dark grey color looks clean and versatile, and the 7-inch length feels modern without being overly short.
The fabric has a smooth, cool feel and dries quickly, which is great for hot days or even light water exposure. The elastic waistband and drawstring are comfortable without looking sloppy, and the hidden zipper pocket is actually very useful for keys or cards.
Another thing I noticed is their durability that they hold their shape well and the material doesn’t wrinkle easily. They work equally well for relaxing, walking around town, travel, or casual dinners outside during summer.
Overall, these feel more expensive than they are. Comfortable, lightweight material, practical, and surprisingly stylish.
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Reviewed in the United States on May 22, 2026
★★★★★ 5
Fast drying polyester short for casual wear or to use at the beach
Size: Small, Color: Army Green, Size: Small, Color: Army Green
The TACVASEN men's 7" casual beach shorts are lightweight stretchy polyester shorts featuring an elastic waist band for added comfort. These shorts are nicely constructed and durable with no visible signs of defects out of the package. These shorts wear and feel comfortable for all types of activities or for just casual wear if you just want to lounge around. There are two average sized pockets one on each side and one zippered side pocket for added security and a rear pocket suitable for a normal sized wallet. I'm a 5'10" man and these shorts reach to the top of my knee. These shorts also have an average sized drawstring for added tightness if desired. The polyester material allows for fast drying. Overall these shorts offer a good value for wearing to most occasions.
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Reviewed in the United States on June 1, 2026
★★★★★ 5
Great casual shorts
Size: Small, Color: Blue Gray
These men’s water-resistant beach shorts have been a great purchase. I got them for my son, and he says they’re extremely comfortable. He especially loves how soft the material feels, which makes them easy to wear all day at the beach, pool, or just casually around town.
The water-resistant fabric works well and dries quickly, which is a huge plus for swimwear. They fit nicely and allow for plenty of movement without feeling stiff or heavy. Overall, these are comfortable, well-made shorts with great material, and my son has been really happy with them.
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Reviewed in the United States on May 10, 2026
★★★★★ 4
Nice shorts but no fly
Size: Medium, Color: Blue Gray, Size: Medium, Color: Blue Gray
These shorts are well made with three pockets on the sides, 2 standard and one zippered, along with one pocket on the back. They are made of a polyester fabric and do feel as though they will be waterproof. They are well constructed and should hold up well. My issue with these shorts is that they have no fly, just fake stiching on the front. Yes, they say they are for the beach, but that is no reason not to have a fly. Swim trunks are one thing, no one expects a fly on them, but on shorts, yes I do. I always like to include a picture of the laundry instructions,, I hate getting something and discovering it takes special care.
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Reviewed in the United States on March 11, 2026
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