N55 Downpipe question

[SGJB135i]

Hey guys, well i am new to the n55 scene, i was with the better side before (n54 hehe) . What exactly is the difference from the CPE 5 inch compared to the 3.5 Inch downpipes? More power? Louder? Please let me know, thank you in advance

[c_ozanich]

There's going to be sound differences when increasing pipe size to that large, it'll be a lot louder. If you aren't planning on rebuilding the turbo's to handle excessive boost, a 5 inch pipe won't have much bigger effect performance wise than the 3.5" on a stock turbo. Maybe 1-2 HP for the larger size, but when the DP upgrade itself gives you 15-18HP, its not worth considering unless you are building it with a racing purpose.

I went with a catless AR that's 4" and I thought it was too loud, ended up buyin gberk mids to cover the raspiness of just the DP. I wouldn't recommend any larger than 4 on a stock turbo. Even then 4 inch can handle plenty of power output...

[SGJB135i]

Originally Posted by ///MonsterNtheMaking

There's going to be sound differences when increasing pipe size to that large, it'll be a lot louder. If you aren't planning on rebuilding the turbo's to handle excessive boost, a 5 inch pipe won't have much bigger effect performance wise than the 3.5" on a stock turbo. Maybe 1-2 HP for the larger size, but when the DP upgrade itself gives you 15-18HP, its not worth considering unless you are building it with a racing purpose.

I went with a catless AR that's 4" and I thought it was too loud, ended up buyin gberk mids to cover the raspiness of just the DP. I wouldn't recommend any larger than 4 on a stock turbo. Even then 4 inch can handle plenty of power output...

oh i see, I want it to be loud, so a 5 inch will do good lol.