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Originally Posted by ae86andrewcrew
thanks for all the help guys but i have one more question for everyone! i hope you guys see this because i'll be going to roadrace engineering tomorrow and i want to know what type of bends and how much u guys recommend that i pick up! its an 89 240sx coupe and i have an i/c w/ a core size of 24x11x3. any help will be appreciated. thanks! the website is posted in the above post and the bends are under DIY and then mandrel bends. thanks a lot!
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i used 3 U-bends for the hot side. two 2" bends to get to the fender, then one 2.5" from the fender to the IC. cold side; i used two U-bends. 2.5" and 3". i cut a hole in the battery tray. if you go with fmax's design you will need another U-bend.
it also helps to have scrape Ubends that were cut up. i went to a muffler shop to have the pipe expanded. 2.5 to 3"