DeeJax71 5 Report post Posted February 7, 2020 Hi, Am currently looking for some advice on what to do with the exhaust on my 130i. It is currently running a stock exhaust system, and I have seen a lot of resonator deletes / Y pipe installs being done with a 135i back box and was wondering if i could just get away with the resonator pipe delete until I find a 135i back box or should I wait till i get the back box and get both done at the same time. Quote Share this post Link to post Share on other sites
M3AN 4016 Report post Posted February 8, 2020 Mine has a Y pipe, resonator delete and custom backbox and it sounds sweet IMHO. Not too loud until you really stomp on it. You can do it in stages for sure, won't cost you much more. 135i back boxes might be difficult to find in NZ so you may have to be patient. I think you can also modify the 130i backbox for more efficiency and noise but you'd need to read up on that. I also think the stock box has a muffler flap, if you keep the box get that flap disabled when you put the Y pipe in. Quote Share this post Link to post Share on other sites
Jacko 2157 Report post Posted February 24, 2020 Keep an eye on these guys, in Strayla, they are doing some cool stuff with N52s. The headers they make are stupid expensive for mild steel, but the proof is in the pudding I guess. https://www.brintechcustoms.com.au/all-products/n52-custom-exhaust-headers Quote Share this post Link to post Share on other sites
Herbmiester 931 Report post Posted March 24, 2020 Nice looking headers but wow they are expensive Quote Share this post Link to post Share on other sites
