Shipping Estimate
USA
- USA
- CAN
- USA
- CAN
Ships within 48 hours · Estimated delivery Jul 6 - Jul 11
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For Your Every Summer RSVP, with Code: SUMMER15
Description
Our World Is Flat - Pistons short sleeveThis shirt features the iconic horizontally opposed pistons of the Flat 6 Engine used in all Porsche 911s and many of it's best race cars. Our world is flat. Get a knowing nod from your tribe, those who know, those who understand the power of the battle tested Flat 6 Engine! This simple shirt says it all with style. This is the black print on light shirt (white or grey) version of the iconic shirt. 100% ring spun cotton Sport Grey is 90% ring spun
This shirt features the iconic horizontally opposed pistons of the Flat 6 Engine used in all Porsche 911s and many of it's best race cars. Our world is flat. Get a knowing nod from your tribe, those who know, those who understand the power of the battle tested Flat 6 Engine! This simple shirt says it all with style. This is the black print on light shirt (white or grey) version of the iconic shirt.• 100% ring-spun cotton
• Sport Grey is 90% ring-spun cotton, 10% polyester
• Dark Heather is 65% polyester, 35% cotton
• 4.5 oz/yd² (153 g/m²)
• Pre-shrunk
• Shoulder-to-shoulder taping
• Quarter-turned to avoid crease down the center
• Blank product sourced from Bangladesh, Honduras, Haiti, Mexico, or Nicaragua
Size guide
| S | M | L | XL | 2XL | 3XL | |
| Length (Worldwide) (inches) | 28 | 29 ¼ | 30 ¼ | 31 ¼ | 32 ½ | 33 ½ |
| Width (Worldwide) (inches) | 18 | 20 | 22 | 24 | 26 | 28 |
| Length (East Asia) (inches) | 26 ⅜ | 27 ½ | 28 ¾ | 29 ½ | 30 ¼ | |
| Width (East Asia) (inches) | 18 ½ | 19 ¾ | 20 ⅞ | 22 | 23 ¼ |
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
4.4 ★★★★★
Based on 502 reviews
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Product Reviews
★★★★★ 5
Fine product
Size: 150 ml, Pack of 1
This one works
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 24, 2026
★★★★★ 5
Works great!
Size: 150 ml, Pack of 1
This product works great for cleaning valves. Very effective formula that does the job well. Arrived quickly and was exactly as described. Would definitely buy again!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 2, 2026
★★★★★ 5
Molly valve cleaner
Size: 150 ml, Pack of 1
Put this in my truck with a RAM engine it was kind of running a little bit rough not really sure what was going on I thought I'd get this liquid Maui a try and she smoothed out some but you know who knows it could be all Hocus pocus
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 23, 2026
★★★★★ 5
Good product
Number of Items: 1
Bought to see if it would help with oil consumption. Good quality it seemed to help for first 1000 miles. Xc60 with over 140k
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 24, 2026
★★★★★ 5
Less oil consumption
Number of Items: 1
Made my engine noticeably quieter and felt smoother. Way less oil consumption then before definitely cheaper than topping off often
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 19, 2026
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