Since the k tuner arrived I felt a significant difference in my Si. This product is amazing!

I have been running the flashpro base map for a while, have greddy sp exhaust, map intake, greddy front mount, invidia front pipe and aem chargepipe. This tune pulls hard! Much more midrange torque,smoother acceleration, what can i say 26psi is not a joke!

I never had any plans on modifying my car at all but wanted more get up and go. First thing is first, I was blown away at what a change just installing the ktuner and testing out the maps made. Definitely a must buy. I still don't have any plans on any major modifications but an upgraded intercooler is on my to do list now. If you are on the wall about purchasing the ktuner, do it you wont regret it.

Tune is awesome has good tq good power love the being able to switch on the fly from a daily driving tune to the full power tune with no problems

Shipped fast!!!

you feel a big crazy different once you get stage 2 and some beautiful tasty e85

I’ve dabbled with both the K-Tuner and TSP tunes and I have to say that both tunes are extremely refined. K-Tuner supplies an excellent off the line start for city driving, and TSP pulls hard near the top of the rev range. Both tunes make the car a lot more drivable and provide a greater off the line reaction than the Honda base tune (I have the CVT). Now I can easily jump out in front of traffic without worrying if the car will take off in time. For daily driving, I’ve been utilizing the TSP map one and it provides smooth power delivery in low rpms. However, map 3 is completely bonkers. The car still has some low-end grunt, but the top end is magical. I ended up sticking with TSP because although I enjoyed the fast boost and tire squealing of K-Tuner, I really enjoyed how linear the power delivery is for TSP. The older mustangs with the 4.0 V6 are always surprised when I pull away.

vs Ktuner Dual map, this definitely feels more refined. Power comes at a steady rate and doesnt make the car feel jerky like the ktuner starter maps do

My car is another one now. Very good product

These fits perfectly and looks great too!!

Excellent customer service! Assisted with applying a veteran's discount and provided good communications regarding ECU unlock process. Products were received on time and as expected. Thanks for great service!

Great quality!!!

Fast shipping and this is easy to install.

stocks vibrates a lot on stage 4 clutch. This is the best mount if you upgrade your clutch!

No need for BOV if you have this with th cobra, before i have the street maf and i upgraded it to this and it is way much louder spool noise! I love it!

This shift know is awesome! Definitely feels better than stock; gives the feel of a short shifter! Bought one privately and Installed to my 9th gen civic Si, and had to have it in my 10th gen civic Si too!

Fast and great

I have been using different ktuner base and starter maps for months and they were good. But this tune is on the next level.

Relative easy install and with a tune the car feels good. Boost seems to come on earlier and temps are lower as well. Two Step Performance has been great to deal with. Looking forward to buying the downpipe next.

Quick shipping and great customer service! Love my TSP Stage 1.

You have to push the throttle hard for bottom end response but you can definitely feel the top end difference over ktuner base maps

I love this tune it’s really good definitely added power over the base ktuner maps and has way more top end power. Easy to install and switching tunes and launching rpm off the cruise buttons is very easy. They have this tune set up really good and I can really tell it’s much safer for your engine over the ktuner maps.

Knock control is perfect at .59 and long term fuel trim within 1%. Best tune I've tried so far. Enabled my launch control and traction control with flashpro by request.

You can definitely tell the car opened up a lot more with this 3 inch dp/fp combo...paired up with an exhaust it feels much nicer and definitely pulls a lot more!

EASY INSTALL AND BOOST

This is by far the best bang for your buck mod for 10th get Si’s. I absolutely love the Ktuner and the TSP Stage 1 tune. I mostly use map 2 but which is already a huge difference from stock, and map 3 completely wakes the car up. Highly recommend this product and I believe it should be one of every Si owner’s first mods.

Fuel economy is a little better than stock and it’s a power difference you can feel

Looks good, feels durable, I ordered it from TSP and it came in like two days later.

This product is great quality. Messed it up laying it down straight, but it didn't matter becuase it was strong enough not to rip while fixing it. Install took all of 2 minutes, just clean surface and lay down.

Smile from ear to ear thanks a lot guys

I purchased the catless down pipe and front pipe. Quality parts and easy installation. With jack stands and garage took me approximately 3 hours total. I was absolutely surprised the restriction a stock catalytic converter has. This is paired with factory exhaust on a 17si. I highly recommend this product to everyone that wants to wake their car up! Twosteperformance has been outstanding from purchase to shipping. Thank you!

I was getting scratches on my door sill. This looks great and is incredibly easy to apply. Went down without a hitch.

Seems to work. I like it but I'm not sure I would do it again. Taking apart the Cold Air feed to the turbo is a bit of a pain. A bunch of blind bolts. If you go ahead with this, one trick I figured out was to tape the bolt onto the ratchet with electrical tape. Worked great. I would also recommend buying replacement fittings before starting as well. You are going to lose some.

Guys I have shown it to really like it!

TSP Stage 1 Tune for 2017+ Honda Civic Si

Can't go wrong with this purchase. Made from quality parts and in my opinion the most aesthetically pleasing oil cap available.

I was so skeptical about Tunes and messing with the ECU. But TSP really did change my view on it. Got the Ktuner and the Tune today and uploaded it my car felt brand new! Definitely a big difference from stock! So glad I got and will definitely be ordering from here! My PRL CAI RACE MAF should be here soon and it’s such a great timing to get the tune and the race tune now! 10/10