i had # 70 series flowmaster installed a couple of weeks ago,both tail pipe tips on the inside are showing rust,should i take it back to the shop were i got it installed?
Thanks Joe

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1999XLT,Supercab,Gold,5.4Styleside,Flowmaster#70 Series Catback,Rockford Fosgate 400a4 Amp.MTX-5000 Dual Eight's Sub.
Uniden Radar Detector.
Black Tinted Windows "For That Florida Sun"
corpstop@aol.com
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[HAVE FUN]

 

If you paid for SS, Yes.

If you got aluminized, No. Aluminization will do well on the exterior piping. I doubt it was aluminized on the inside. Even so, inside the pipe it is subject to chemicals and chemical reactions that it will not withstand.

IMHO

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1999 F250 SD CC, LWB, 5.4L, Auto, 3.73, 4x4, Power TT mirrors w/ marker lights, White, Full Tint, PendaPro SR, Flowmaster Delta 40 series, K&N filtercharger, Superchip(Airbox reinstalled, no improvement found with out it.)

 

Isn't there a paint or something like that, that you can use on the inside of the tips to stop the rust from forming ????? I had a set of dual tails on my '87 and they did that too but never really worried about it. Had heard about this paint idea after it was gone.

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1994 F-150 XLT Supercab, Long Box, 302 EFI, Automatic, Royal Blue in and out, Captain Chairs. Chrome Rims 15x8's, Michelin LTX M/S 105S 235/75R15 (Summer), OEM Aluminum Rims 15x8's, Michelin LTX M/S 108S (Winter), Lightly Tinted, Soft Tonneau Cover, Ford Receiver Hitch Cover & Lock, Alpine CDM-7829 Head Unit, PPI 4800 Amplifier, Kicker 10" Solo Baric Sub with Custom Box and Kicker Impulse 6.1 Mid & Tweets.

 

I was told to put WD-40, or was it rust inhibitor (I don't remember), on the inside of the opening of the pipes. I haven't noticed any rust on the inside, its the rust on the outside that is making me mad.

 

I was told to put wax on the outside of my tips and tailpipes to keep the rust off. So far it works pretty well!