6637 Mod on Early 99

[jbawilliams]

I just did the 6637 Mod on an otherwise stock early 99, except for FPR shim. Woo Hoo!! I can really feel the difference. I used a 3" long piece of 4" exhaust pipe, and half of a rubber 4" plumbing repair elbow. I cut it so I ended up with 2 45 degree elbows. I slipped the 4" pipe into the cut end, and clamped, and the large end, made to slip over 4" black iron pipe fit the snout of the 6637 perfectly. This left it exactly the right length to match up to the OEM tubing to the turbo. I think it looks good. I got the elbow at the Menards. Any home improvement center should have them - about $13.00 + $20.00 for the filter from Fleet Filter, and $1.00 for the short piece of exhaust pipe. I Like!:burnout

[Gramps]

Very Cool! Those things really flow some air don't they!

[Cope99]

What exactly is it ?

[mschn99]

Originally Posted by Cope99

What exactly is it ?

commonly called the big honkin air filter or they tymar air filter mod....6637 is the filter number at napa....

[Cope99]

Thanks I wasnt sure.

[Marty]

DIY Intake

[F-350MAN]

I also just did mine and I'm very satisfied but does the turbo swooooosh sound after I let off hurt anything