Pay in installments of $78.57 with
,
and
Shipping Estimate
USA
- USA
- CAN
- USA
- CAN
Ships within 48 hours · Estimated delivery Aug 12 - Aug 17
Promo Codes Available:
For Your Every Summer RSVP, with Code: SUMMER15
Description
Dinan Performance Spring Set - 2019-2026 BMW 330i / M340i / M440i (xDrive)Suspension systems that not only transform the stance of the vehicle but also maintain ride quality and improve upon handling are what Dinan suspensions are known for. This is accomplished by pairing springs sets with bump stops spring perches or both to maintain suspension travel resulting in a smooth ride while also improving mechanical grip and handling. This is what makes Dinan suspension systems unique. While we are able to sell each component
Suspension systems that not only transform the stance of the vehicle but also maintain ride quality and improve upon handling are what Dinan suspensions are known for. This is accomplished by pairing springs sets with bump stops spring perches or both to maintain suspension travel resulting in a smooth ride while also improving mechanical grip and handling. This is what makes Dinan suspension systems unique. While we are able to sell each component separately, it is highly recommended that both the spring sets and the supplemental ride quality and handling kits are used in tandem in order to maintain the Dinan quality standards our customers are used to. Experience the Dinan difference with this combination and enjoy the ride it provides. Dinan's Performance Spring set for the G20 M340i (RWD) and 330i provides greater control over body roll by virtue of carefully calibrated spring rates. Additionally, Dinan lowers the car for improved suspension geometry and an even more aggressive stance. The Dinan springs are CNC wound with high tensile chrome silicon wire and shot-peened for stress relief to last the life of the car. The increase in stiffness will reduce the rear suspension compression under acceleration and front suspension compression (or dive) under braking, giving your car a more controlled feel. The Dinan performance springs will also provide a noticeable improvement in grip for high-speed driving situations that will inspire confidence in your car's capabilities. The reduced body roll makes the steering more responsive to driver input and will be noticed at low speeds up to the top speed of the vehicle. NOTE: Dinan Performance Spring sets should be purchased and installed with the corresponding Ride Quality and Handling Kit to achieve the advertised ride height performance and ride quality. While not explicitly required, if the matching component is not purchased and installed you will get less than favorable results in the form of poor ride quality and improper handling traits. While we will maintain a full warranty on product defects any claims against the car's improper handling ride quality traits due to not purchasing the corresponding handling kit will not be warranted.
Features:
- Vehicle lowered 1" in the front and rear (M340i RWD & xDrive).
- Vehicle lowered 1-1/8" in the front and 5/8" in the rear (M440i xDrive).
- Vehicle lowered 5/8" in the front and 3/4" in the rear (330i xDrive).
- Vehicle lowered 1-1/8" in the front and 3/4" in the rear (330i RWD).
- Compatible with both conventional and factory electronic shocks.
- 15% increase in spring stiffness in front and rear (M340i RWD).
- Negligible change in spring stiffness in front and 10% increase in the rear (M340i xDrive).
- Negligible change in spring stiffness in front and 23% increase in the rear (M440i xDrive).
- 7-95% increase in spring stiffness in front and 34-92% in the rear depending on stock spring configuration (330i).
- Substantial reduction in body roll.
- Preset to prevent spring sag.
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
4.1 ★★★★★
Based on 15 reviews
Sort
Product Reviews
★★★★★ 5
Soft to the touch
Scent: Keratin, Size: 2 Fl Oz (Pack of 1)
This is one of the BEST heat protectant that I have ever use. It leaves my hair none greasy but incredibly soft to the touch. It was money well invested.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 31, 2026
★★★★★ 5
Great mask! I use less then the recommended and
Scent: Keratin
Okay, long review here from a busy working mom. Here it goes!
I have color treated hair that comes half way down my back, not really thick or thin, and wavy not curly or straight. I bought the Keratin Shampoo and Conditioner as well as the mask after seeing several hair enthusiasts telling someone that the way to help get rid of their unruly frizzy hair with our Florida humidity was a Keratin treatment. I don’t wish to spend the money on a treatment so I decided to try this set after reading product reviews. I am not disappointed! The first use and I could feel the difference of the Shampoo compared to others. It lathered nicely and left my hair feeling clean but I could tell it was leaving nourishment behind not making my hair feeling rough. Next came the conditioner. Now, since I fully intended on doing the mask right after anyways, I didn’t do my normal ritual of putting the conditioner on and leaving it for a few minutes before a cold water rinse. I simply put it on and almost immediately rinsed it out with the same temperature water I was showering in. My hair felt so soft and smooth instantly, better then other conditioners I have used and left on for lengths of time to really try to condition my hair. Just these two products are amazing but… then came the mask. I towel dried my hair as recommended and then applied the mask to my hair. I didn’t follow the guidelines of how much they said I should put in because it honestly seemed like overkill once I applied some in. If I had to guess it was probably 3/4 of an ounce to maybe and ounce when the mask directions suggests 2-4oz. I left it on for the 10 minutes without applying any heat and then cold water rinsed it. I don’t blow dry my hair so I let it dry naturally and could tell my hair was less flighty and softer. The next morning I straightened my hair and OMG! It was so soft, smooth and beautiful. People actually noticed the difference in my hair but couldn’t figure out what it was even though I proudly told them. I went all day at work (retail) without brushing my hair once. It didn’t tangle like it usually does and looked great even after going in and out of the building. I was so excited to do the next treatment (I didn’t it tonight and the decided to post this) and see what the results are (won’t really know until tomorrow) but I already know they are undoubtedly going to be amazing. How I’m going forward with my treatments, shampoos and conditioner every shower. Mask 3 times week one, 2 times week two and then hopefully once a week after that depending on if I feels like that’s enough. I was so happy with these results I had to share in case it helps someone else! Sorry again for the long review but someone needed to here it.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 16, 2026
★★★★★ 5
Excellent product
Scent: Keratin
I have had frizzy hair all my life and once I went gray it became very much like my wire terrier’s hair! I have had keratin hair treatments but they are expensive. I use this keratin mask once or twice a week after shampoo and it works exceptionally well. I love the smooth silky texture of my hair. Well worth the price and it saves me money.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 5, 2026
★★★★★ 4
Deep Conditioning Boost That Leaves Hair Softer
Scent: Keratin
I’ve been using the Keratin Hair Mask as a weekly treatment, and it has noticeably improved the overall feel and look of my hair. The mask has a rich, creamy texture that’s easy to apply and spreads smoothly through damp hair.
After leaving it on for the recommended time and rinsing, my hair felt softer and looked more hydrated. It helped reduce tangles and left my strands feeling smoother compared with regular conditioner alone. On days when I skipped styling products, my hair still looked healthier and less frizzy than before using the mask.
The scent is pleasant and not overpowering, and the mask rinses cleanly without any heavy residue. Over time, I noticed less dryness and a bit more shine, especially toward the ends where my hair tends to feel drier.
Pros:
Deep conditioning that improves softness
Helps reduce tangles and frizz
Pleasant, not overpowering scent
Rinses clean without residue
Cons:
Not a dramatic repair for severely damaged hair
Can feel heavy if left on too long
Overall:
This keratin hair mask is a solid choice if you’re looking for extra hydration and smoother texture between washes. It provides noticeable conditioning without weighing hair down and works well as part of a weekly hair care routine.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 29, 2026
★★★★★ 5
It keeps my hair looking great curly or straight
Scent: Keratin
I love this hair mask or conditioner. Not sure what it’s called. I know that I tried it a few years years ago and it really worked great with my thick curly hair. And it looks great when I blow dry it in my hair looks amazing shiny. I really like the product. I usually buy it every month, but I had suffered for a few months nothing wrong with the product. I just like to try all types of products I put in my hair whenever is out there new or old I will try it like I said my hair curly not very curly but enough that I need strong, thick conditioner I don’t like the I usually say my hair is damaged and that way I get the thick shampoo and conditioners thank you.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 24, 2026
recommand products
2 Piece - Naqsh Suit With Box - 42508037
3084.25
Beck Hansen Signed Autographed BLUE MOON Song Lyric Sheet Beckett BAS COA
99.99
Granatelli 96-99 Mazda Mpv 6Cyl 3.0L Performance Ignition Wires
146.00
Marky Ramone Signed Autograph Ramones BEAT ON THE BRAT Song Lyric Sheet COA
74.99
Blue Chappal-440782908
2044.25