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All products are shipped from our Italian Warehouse (EU)

Contact us to receive the correct delivery time of your order!
Many products are made after we receive the order!

Last reviews

By (Fuengirola, España) on :


Product rated : Arrow Aprilia Sx 125 4T Muy bueno el producto una excelente entrega y profesionalidad muy contento

By (Roetgen, Germany) on :


Product rated : G&G Bike No Kat Dacatalyzer Kawasaki ZX-10R Bin voll zufrieden hat alles gepasst nur mit dem lieferung hat's gedauert durch Feiertagen aber in algemein ????????????

M4 Tuning


M4 Tuning is proud to be the official dealer of the brand QD Exhaust.
We offer targeted advice for choosing your new sport exhaust system.

QD Exhaust

QD EXHAUST - Sistemi di Scarico

QD Exhaust born under the name Quat-D specializing in the production of exhaust systems for four-stroke motorcycles.
QD products are developed to offer the highest quality and performance for Your bike.
Today QD Exhaust is a company that has an operating unit of 1.300mq consists of administrative offices and design, and a warehouse with a storage media to meet in 24/48 hours, the demands of the market (depending on the season).
The company is certified under UNI EN ISO 9001 certified by TUV.
All fasteners are made ​​of AISI 304 stainless steel laser-cut, while the welds are TIG.
All exhaust systems are dimensioned and calculated using sophisticated fluid dynamics software in order to provide maximum efficiency and performance.
All products are approved E3 and all products are supplied with a removable catalyst (where required).

Qd Exhaust offers four product lines:
- MAGNUM Sport exhausts line for street bikes
- EX BOX Sport exhausts line of high performance under engine exhausts patented
- A.M.A. Sports exhaust line dedicated to American custom bikes
- MAXCONE Sports exhaust line of conical exhausts

Tips for buying:
BUDGET: MEDIUM HIGH (€ 350 -> € 1750)
WARRANTY: 24 MONTHS (No Carbon products)

Ask for a detailed quote about Your bike. We will send you a quote in less than 24 hours inclusive of VAT, discounts and shipping.

Prices vary from bike to bike and depend on the type of sports exhaust and materials chosen.

QD EXHAUST - Sistemi di Scarico