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Red Line RL-600 is a full synthetic DOT 4 brake fluid for street and track. The numbers that matter are the boiling points: 601 °F (316 °C) dry and 394 °F (201 °C) wet. The dry figure is what a fresh flush gives you on a track day, the wet figure is what is left once the fluid has taken up moisture in service, and the gap between them is the margin against a long pedal after repeated heavy braking.
Red Line states RL-600 conforms to and exceeds the current U.S. FMVSS No. 116 DOT 4 specification and lists SAE J1704. Viscosity runs 1414 cSt at −40 °C and 2.6 cSt at 100 °C with a pH of 7.19. Red Line's instruction is not to mix it with other brake fluids — it blends with and meets DOT 4 specification, but blending may compromise its performance.
Features:
- Full synthetic DOT 4 brake fluid; Red Line states it conforms to and exceeds U.S. FMVSS No. 116 DOT 4 and lists SAE J1704
- Dry boiling point 601 °F (316 °C)
- Wet boiling point 394 °F (201 °C)
- Viscosity 1414 cSt at −40 °C and 2.6 cSt at 100 °C
- pH 7.19
- Red Line positions it for racing, performance and street use — a street car that sees track days included
- Red Line instructs that it not be mixed with other brake fluids; blending may compromise performance
- 500 mL (1.05 US pint) bottle
Fitment: Hydraulic brake systems that specify a DOT 4 brake fluid, on the street and on track. Red Line states RL-600 conforms to and exceeds the current U.S. FMVSS No. 116 DOT 4 specification and lists SAE J1704, and describes it as engineered to hold viscosity, lubricity and compressibility stable at extreme temperatures to guard against brake fade and vapour lock. One 500 mL bottle is a typical single-caliper-pair top-up; a full flush and bleed on most cars takes two or more.
Please note: Do not top up on top of your existing fluid or mix it with any other brake fluid — Red Line says blending may compromise its performance and instructs that it not be mixed, so flush and bleed the system so it runs on RL-600 alone.
Part #: 08352290404 (Red Line 90404)
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Let customers speak for us
Solid shipping ,good communication ,great product 5stars all the way
First let's preface I have tried three other tuners. Not bad mounting or name dropping as they all were solid tunes. But Daniel just has that magic touch when tuning the 1.6 platform.
The car has a buttery smooth power band making the car feel like a larger displacement six cylinder over a turbo charged car. Plenty of fun to be had at any speed or RPM range.
He will take the time to get you dialed in perfectly for your car. No canned tunes here folks. And if you are a EK1 user three tunes for the price of one simply can't be neat.
I received the Stage 2 tune. Here are my thoughts:
- The shifts are buttery smooth
- I love the auto shift @2000rpm when cruising around town; saves me an extra 2-3mpg overall
- Driving in traffic is a dream now, much better than stock. I don't even hear that annoying shifting fork anymore, lol
- Any and all DCT slips are gone
- The increase in torque limit! This opened up my N75 Stage 3 ECU tune; I can feel the difference. The last time I dynoed, I got 289 lb-ft of torque. But it feels much more substantial than that!
- The clamping force is unreal. I did a run from a dig, and it hooked and slammed through the gears all the way to 7k rpm in each gear. Amazing.
Conclusion: This TCU tune is a must-have. If you have an N75 ECU tune, it is an absolute game-changer! Especially with the Redline MT-LV fluid that I'm running. I can't wait to get my retune with water meth injection. Daniel and the rest of the N75 team are the best!
Works like suppose to be fast delivery after installation 5 minutes drive TPMS sensors lights off everything is normal like from factory 👍👍👍
![Hyundai Elantra N TPMS Sensor Set of 4 [OEM Hyundai MOBIS]](https://cdn.shopify.com/s/files/1/0276/1359/3623/files/359598029_246649464881156_6848003515050026659_n_70x70.jpg?v=1690929846)
Product was very easy to install and what a difference in shifting also n75 was super awesome to deal with will shop here again
After using the N75 tune for a couple of months, I can confidently say that it offers the best value for your money on the market. I've tried SXTH and LAP3 tunes before, but since switching to N75, I won't look back. With top-notch customer support, it ensures your car performs better, turning heads at every car meet.
Been running stage 2 off that bat and had some problems here and their regarding fueling. Daniel has been with me the whole way, answering questions and adjusting tunes while adding revisions whenever asked. He answers every question I ask even when they don’t relate to tuning.
Highly highly recommend N75!
Daniel's tuning and customer service makes this product a 10 out of 10. I'm new to tuning and he made the process a breeze. I literally laughed out loud when I first drove the car after installing the stage 2 tune. I still can't believe the difference.
Love the intake, fitment is superb, instal was easy and best of all n75’s customer support is stellar and way above average!
M45IL Kia Stinger GT 3.3TT Spark Plugs
Hands down best bov I’ve had, I got the part 5207 for trumpet sound and man. You won’t be disappointed. Shipping was fast & easy.
Looks great!
Fast shipping, easy to install, quality built.
Waiting for some more parts then dyno time!
Awesome
Perfect size and great location for the WMI port.
