Ferdi Sevilmis

1 year ago

Very satisfied with the tuning, and very customer-friendly. TOP!!

Mikail Sariaslan

4 years ago

One of the best examples to experience how quality can change the whole process. It was a great day, special thanks to Tuna! Guaranteed Satisfaction!

Tim Steijn

4 years ago

I was at GSG last week to have my car custom chipped to Stage 2+. After receiving good advice about things that weren't right, I went back and what professional work Tuna delivered! They listened exactly to my wishes and what I wanted. The car was perfectly tu…

Ss SW

1 week ago

Top company delivers nothing but quality; definitely worth bringing your car in.

Evento Booth

2 weeks ago

Had my Formentor VZ tuned; a real tuner who tunes custom-made, takes my wishes into account, doesn't let you go until everything is right, screens everything with logs... I can't say anything bad about him; I am now proud of my car after his work.

Halil Aynihan

3 weeks ago

A real tuner who custom tunes; they rarely take hours to do Stage 1. I finish cars with Stage 2 tuning, my Golf 8R. Says enough!! Best tuner, no doubt whatsoever!!!

Krasimir Hristov

4 weeks ago

Top service and craftsmanship! I am extremely satisfied with the work. My car received a Stage 1 tuning and the difference is clearly noticeable – much more power and a much smoother driving experience. Additionally, extra adjustments were made, including to…

Job Vd Made

4 months ago

I had my car tuned to stage 1 yesterday. Great service, everything was taken care of quickly, definitely recommended!

ahmet deveci

5 months ago

Everything tailor-made..!!

M. Koster

5 months ago

Styling, audio, performance, everything under one roof. And what a roof! Under this roof, finally, HONESTY regarding every form of tuning. Simply put, if you want beautiful styling, well-functioning audio, or want to turn your car into a beast, look no further…

kevin tivi

7 months ago

I recently went to this company to have my Audi A4 stage 1 tuned. I received good help and everything works well. I am very happy with the stage 1 tuning.

Tahir Ulucay

9 months ago

In my experience, the best location where I have left my car with peace of mind and am currently driving it without any problems.

Dennis Ederveen

9 months ago

I had my car tuned here and I am super satisfied. The customer service is great too; they are happy to help you and explain their work. I had a small problem the next day. I called them up and they came by the very same day to help me out. Definitely recommend…

Leigraaf Motoren

9 months ago

Very good experience, recently tuned a Sprinter and E63 AMG Stage 3. The tuning is truly custom. Top-notch service, I will recommend it to everyone.

Emircan Yilmaz

9 months ago

I bought my 2020 A45S from Belgium. The previous owner had stated that the car had been tuned, but that the tune had been removed. Unfortunately, that wasn't the case. I discovered that the tune they had put on the car in Belgium was terrible. The car was even…

emre mer

9 months ago

I had my Cupra Formentor tuned here, including a DSG tune, service, and tire replacement. My car drives ten times better than it did before. It had a fantastic tune, and the dyno even gave me a nice graph! Very friendly people! If you love your car, definitely…

Hans Bouchans

11 months ago

No words but actions, very well helped, clear agreements and everything is neatly followed up, friendly guests, definitely recommended 🚀🚀🚀

Bekir Yildirim

1 year ago

My C43 AMG was tuned by this expert! He thoroughly walked me through every step and showed me everything. I felt heard and understood when I explained what I wanted. He also took his time and did everything very professionally!

Omar van luijk

1 year ago

Excellent service. He takes his time customizing the tune and recommends realistic tracks. It takes a while, but afterward, you'll have a truly powerful car. I definitely recommend them!

Diego Spataro

1 year ago

A tuner who knows what he's doing! Top-notch service and top-notch work! Definitely recommended! 👊💯

Raif Hausil

1 year ago

I went here for a chipping and installation of a new intake manifold. Appointments were made and kept promptly. The mechanic clearly knows his way around chipping, chooses safe options, and does everything right in front of you, which inspires confidence. I'd…

Anıl Hüsmenoğlu

1 year ago

Thanks for everything, you worked hard and we got the dyno test results we wanted. I recommend it. Transmission software C180-156 hp 250 Nm Stage 1-180 hp 300 Nm

Gti Tcr

1 year ago

Great service and friendly, top company. Recommends it to everyone. Keep up the good work, gsg. Performance

Pure grey gti tcr

1 year ago

Perfect, professional service. What others messed up, they fixed here! Satisfied and recommend this to everyone!

Mr. JJ

2 years ago

Extremely helpfull and kind service , good comunication , helped me with some previous problems and also did stage one and pop&bang with them , good quality and pleasant people👍

M Kara

2 years ago

Fast service, excellent hospitality, and perfect quality services. Actions speak louder than words at GSG Performance!

Abdul Bikes

2 years ago

Good work and 100% reliable

Mees Kok

2 years ago

GSG-Performance tuned my 7.5 GTI to Stage 1, which really brought my car to life. I highly recommend GSG to anyone who wants to get the most out of their car.

jeffrey haazen

2 years ago

Great service, clear communication about what they're going to do and what the return will be, in terms of capacity, everything was neatly discussed, and the price wasn't too crazy either, just very satisfied with everything, thanks for the correct and good se…

Ali Özkurt

2 years ago

I had my Opel Vectra C GTS 2.2 16v OPC chip-tuned from 155 hp to a stage 1 170 hp here. He takes his time on the rollers and on the road, fine-tuning everything to achieve the best result. He's definitely knowledgeable. My friends praised him highly, giving hi…

persiianpridee ghaeli

2 years ago

I had the center muffler removed from my car and pops and bags installed. Super fast service, great sound, and a competitive price too. Next time I'll have downpipes installed and tuned. I can't wait! 👊😀

Yunus Penbe

2 years ago

Had my transporter tuned, very satisfied with GSG.

Diego Scheuer

2 years ago

I am very pleased with the results of my Golf 7.5 R. I had my car custom-tuned to stage 2 and I definitely recommend having your car tuned at GSG-PERFORMANCE. You certainly won't regret it.

Ismail Ozen

2 years ago

My experience with GSG Performance was excellent. From the first contact to picking up my tuned car, the team's professionalism and knowledge were impressive. My car's tuning was expertly executed, with noticeable performance improvements. The customer service…

Mehmet S

2 years ago

After visiting about 6 ‘chip tuners’ with my T-roc R, I ended up at GSG Performance. After hearing a lot of nonsense stories from other companies, the gentlemen at GSG Performance were honest and transparent. We clearly agreed on my wishes, and a week later I…

Henk Van dissel

3 years ago

What a fantastic company! I just brought my Fiat 500 Abarth to them for Burbles. The results were excellent, and the sound is amazing. They also carefully tuned it so it's not harmful to the engine. Highly recommended.

Khalid s

4 years ago

I had a false air problem, which was resolved thanks to this company. I was helped immediately, and the owner was friendly.

N B

4 years ago

A bit more expensive than the competition, but the end result is impressive.

ian sgarbossa

4 years ago

I took my Mercedes CLS to them because it was too slow, they did me a Stage 1 tune, now it's really worthy of the brand, lots of power

Andrea Chiuri

4 years ago

I brought my Porsche Cayenne to them for some problems with the DPF, they solved the problem and now my car, even if heavy, seems much lighter in acceleration. Did after that directly a Stage 2 tune and the car is pulling like a Airplane Very satisfied with it…

Dario Siric

4 years ago

Polo 1.4TDI Stage 1+ at GSG, they take their time with your car. A good company with knowledge and experience.

Fernando Broos

4 years ago

Very nice company to have work done on your car, good service from the guys. Had my Ford Kuga chipped and it drives many times better than before, super happy with it !!

Niyazi Talay

4 years ago

My experience at GSG Performance Rotterdam, top tuner in the field of tuning, recommended for anyone who wants to tune their car, serious tuning, real horsepower, very happy with the experience he has, good test bench, honest

Ryan Gajadhar

4 years ago

I had chip tuning and pops and bangs done, it's fantastic on my Golf 5 1.6 FSI. After they finished the chipping, they advised me to remove my center muffler for better sound. I was hesitant, but I don't regret it; it sounds fantastic. And for a good price, to…

Atha

4 years ago

GSG=Quality. Bari & Tuna just giving the best of them to make you leave the place satisfied & happy. Highly recommended!

Dylan Van der Knaap

4 years ago

What a fantastic company! I took my car there in the evening. My car had been tuned incorrectly, causing it to exhibit strange behavior, including a lot of noise and a lot of stuttering, which isn't good for the engine. Luckily, I was able to get in right away…