The ABE (General Operating Permit) or EEC Type-Approval is often specific to the part number and vehicle. You can find official documents for the 955 series here:
Having the physical or digital certificate for your exhaust system is critical for several reasons: remus typ 955 abe download
Remus offers high-performance axle-back systems for the first-generation Cayenne (2002–2006). These systems are crafted from high-grade stainless steel and are designed to enhance the 4.5L Turbo engine's note while remaining TÜV approved . Why You Need the ABE/EEC Certificate The ABE (General Operating Permit) or EEC Type-Approval
If the direct link above does not match your part number, follow these steps: remus exhaust faq remus typ 955 abe download
Without the ABE, an aftermarket exhaust may lead to a failed inspection unless it is specifically registered in the vehicle's papers.