I had a single in / out for a Carrera, purchased directly from Monty. The flange was off by about 33mm, the pipe had to be cut and rewelded. Many are quick to point out that the exhaust on these cars warps so your fitment will be off. This may be true but i think my car is pretty spot on... ive run multiple exhaust configurations and never had any fitment problems.
This includes a Bursch test pipe, M&K pre-muffler, Fabspeed CAT and a smogable cat. Mufflers used were a Bursch, M&K, Monty and currently a Dansk sport. Every one of these combos ive used fit without any issue except for the Monty.
Once i got the Monty fitted correctly; i simply could not live with the drone and ended up selling it. Unsure if the drone is attributed to my engine setup...i ran it with a CAT but my engine is not a stock 3.2L. The guy that bought it loved the sound and it fit his car without any issues, which further convinces me the muffler alignment was off.
It did look good once installed...
