InsatiableAmos Posted June 8, 2020 Share Posted June 8, 2020 I've been (cursedly) working through installing a Perrin stock-location turbo inlet tube the past few days. I finally got everything in place and lined up to find that the BPV fitting is blocked by some hard lines rising out of the engine block! I pulled the inlet out and compared it to the stock tube to see the difference - the Perrin BPV fitting is almost exactly 1" closer to the front of the car than the stock BPV inlet fitting. It appears that I should be able to trim 1/2" - 3/4" off the turbo-end of the inlet pipe and everything would line up better, but I figured I'd ask before making moves I can't reverse. Has anyone had to trim their inlet to get it to fit? There's a change a larger compressor housing on my new turbo is partially to blame as well - moved up to the BNR 16G evo 3 turbo... Pic of the stock vs. Perrin inlet together so you can see the difference in BPV location below. Link to comment Share on other sites More sharing options...
SubOperator Posted June 8, 2020 Share Posted June 8, 2020 I had to trim my COBB inlet as well. Be careful, measure twice and really eye the fitment, I almost cut too much at first attempt. Running BNR16G here also. 2005 LGT Wagon Limited 6 MT RBP Stage 2 - 249K 2007 B9 Tribeca Limited DGM - 272K SOLD - 2005 OB Limited 5 MT Silver - 245K SOLD - 2010 OB 6 MT Silver - 205K Link to comment Share on other sites More sharing options...
InsatiableAmos Posted June 8, 2020 Author Share Posted June 8, 2020 I had to trim my COBB inlet as well. Be careful, measure twice and really eye the fitment, I almost cut too much at first attempt. Running BNR16G here also. Ha! Sweet. Glad I'm not crazy thinking this... Curious, do you remember roughly how much you had to trim? Link to comment Share on other sites More sharing options...
awfulwaffle Posted June 8, 2020 Share Posted June 8, 2020 I trimmed my Perrin Link to comment Share on other sites More sharing options...
ttnio Posted June 8, 2020 Share Posted June 8, 2020 my oe turbo inlet didn't have any issue during the install. Link to comment Share on other sites More sharing options...
chato Posted June 9, 2020 Share Posted June 9, 2020 my perrin always seemed like it was trying to pull off the turbo so i’d be cautious about trimming it. better bet might be to get a silicon bpv hose. Link to comment Share on other sites More sharing options...
MaasaiWarrior Posted June 11, 2020 Share Posted June 11, 2020 I trimmed my cobb, ALMOST too much but haven't had any problems 08 Spec B, insta: @08_spec_b, 10 SH Forester insta: @shfozzy Link to comment Share on other sites More sharing options...
SubOperator Posted June 11, 2020 Share Posted June 11, 2020 Ha! Sweet. Glad I'm not crazy thinking this... Curious, do you remember roughly how much you had to trim? I don't recall the exact length to tell you the truth. Besides mine was COBB so it may be different from Perrin in length. One thing I recall was to make sure to measure it with the intake on top, to make sure it's in the proper position for all connectors to clear. I believe that was the adjustment in cutting length I had to make. 2005 LGT Wagon Limited 6 MT RBP Stage 2 - 249K 2007 B9 Tribeca Limited DGM - 272K SOLD - 2005 OB Limited 5 MT Silver - 245K SOLD - 2010 OB 6 MT Silver - 205K Link to comment Share on other sites More sharing options...
InsatiableAmos Posted June 17, 2020 Author Share Posted June 17, 2020 Verdict: I trimmed about 1/4" - 3/8" off the end that connects to the turbo, and everything seemed to fit better, especially the BPV attachment point. For those searching in the future, this was on a 2005 Legacy GT MT, with a Perrin PSP-INT-421BK inlet tube (2.4" turbo connector) and a BNR 16G Evo 3 turbo. Link to comment Share on other sites More sharing options...
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