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- USA
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Ships within 48 hours · Estimated delivery Aug 22 - Aug 27
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Description
Thundermax ThunderMax Engine Control Unit - 309-592 For Harley Softail 2021-2024Features 2 wide band Bosch 5 wire oxygen sensors (18 mm) with AutoTune connection harness ThunderMax quick start easy install and printable comprehensive users manual Never outgrow it easily accomodates bike change No Dyno required automatically tunes for riding style and riding conditions ThunderMax performance engine control module (ECM) 100% engineered and made in the USA Easy to install and simple to use Specs PRODUCT NAME ELECTRONIC CONTROL
Features
- 2 wide-band Bosch 5-wire oxygen sensors (18 mm) with AutoTune connection harness
- ThunderMax quick start easy install and printable comprehensive user’s manual
- Never outgrow it - easily accomodates bike change
- No Dyno required - automatically tunes for riding style and riding conditions
- ThunderMax performance engine control module (ECM)
- 100% engineered and made in the USA
- Easy to install and simple to use
Specs
| PRODUCT NAME | ELECTRONIC CONTROL MODULE |
| BASE COLOR | BLACK |
| UNITS | EACH |
| RIDING STYLE | STREET |
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 26 reviews
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Product Reviews
★★★★★ 5
Great for RV and boat
This stuff is amazing! My husband uses this on the boat and RV. Our RV is orange and was heavy oxidized. This brought the color back!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 3, 2025
★★★★★ 5
Easy to use..great results!
This product actually delivers on its promises! It took of years worth of road film and grime from our motorhome..leaving a clean base for the application of Poli Glow polish... Our motorhome is now looking shiney and new again. Very easy to use..just mop it on..let set for a few minutes then pressure wash off.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 4, 2025
★★★★★ 5
Great product
Amazing product
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 9, 2026
★★★★★ 1
The product downer live up to the advertised claim
Washed a side by side section of my 2022 rv with poli prep and simple green. The comparison was tragic. Simple green definitely is a superior product. Don't waste your money.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 19, 2025
★★★★★ 5
Great cleaner for tough stains on fiberglass
This cleaner was recommended by a fellow boater. I was having difficulty cleaning some black streaks on the hull, and dark stains on the water line. After trying several excellent cleansers that have never failed me, I decided to give this one a try. It cleaned up the stains when used as directed and did not damage the finish on the gelcoat.
A good cleaner to have in your arsenal!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on September 3, 2025
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