It sounds good with my exhaust setup. Pretty quick too

Amazing quality, I purchased this product with a ktuner v1.2 and TSP stage 1 tune and the car moves now! Really fast shipping, two days as promised. Awesome service and I will continue to buy from TSP in the future!

I love this tune! I was going to get the 1+ but chickened out in fear of my stock clutch. Clutch slips below 4k rpm in third gear on map 3 sport mode. I do get some pretty loud pops every once in a while even while cruising. I have a muffler and resonator delete so that might help amplify the volume of the pops. As soon as I flashed the tune and started the car, it sounded happier/freer if you know what I mean. The shipping was insanely fast, 2 days as promised. Overall, it was a quality experience and will continue to buy from TSP in the future.

RS Series Coilovers

Doing wonders for my 10th gen Civic Si. Really is an amazing difference in every gear.
Running TSP Stage1+
Does take a bit to setup though, especially if your PC doesn’t have high power USB to run the Ktuner and if you’ve never used one before, like me. Lots to figure out.
The flashing went smooth enough though and no issues or lights with the tune.
Overall, TSP had the best deal and fastest shipping I could find. Looking forward to more upgrades.

That’s Maf is the best buck for you built a must need to get higher HP and better air induction.

I’m glad this is something I can purchase. I never really used it but it gives me a piece of mind knowing I will receive an item I spent hundreds or thousands on.

Looks good

This is a great exhaust if you're not looking to be very loud. Lighter than OEM. Dyno run published by an outside company showed no drop in power throughout the curve. What little drone there is does not bother me, or I don't really notice it (disclaimer, I am have a 62A RMM). It just sounds great without having to worry about upsetting the neighbors

Great tune. Pulled harder than the original stage 1 tune. Helped improve my lap times. At Palmer, running in third gear in the upper rpm range most of the time, and this is where I felt the improvement.

Excellent product and customer service replied right away to any questions I had. Ktuner works amazing as well as the stage one time they sent me

Works well to replicate the MAPERFORMANCE L15 stud kit. Don’t be fooled, these won’t work without spacers on an L15B7, but they are a critical component!

I ordered the ktuner and Prl race cai for my 2018 civic si. I wish the car came factory tuned like this. Really drives like and SI should factory. Was really impress with just the basemap tunes but TSP stageone +si tune woke her up. Thank you TSP for making my SI more enjoyable to drive!!

Yes installed on a auto, so far so good, does need a e tune to complete its power and handle it too! Daniel from TSP was great with customer service!

Shipping and customer service were great. After locking unit to ecu to get correct version software, played with ktuner dual map base settings and enjoyed them. I had trouble imagining that the TSP stage 1 tune could be as much better as other reviewers claimed, but it truly is amazing. I’ll be installing more bolt on mods from TSP in the very near future, but the stage 1 tune alone makes a bone stock 1.5t non-si a totally different and better animal. The center console mount option fits perfect and tightly, makes the unit look like it was built into the car from the factory.