I have a general question regarding what other owners experience is regarding carbon soot build up in their exhaust pipes. I recently added a Magnaflow to my GXP and guess I notice it more in that the Magnaflow is shiny stainless both inside and outside. It seems that within a day or two the inside of the tips are completely coated with soot. Is this normal? It wipes off easily, just kind of bugs me! Any comments would be appreciated
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2007 Deep Blue GXP
All the usual dealer stuff
Painted GM Splash Guards
JPM Shifter,leather covered console,visors and door elbow pads
Fujita CAI and IC pipes
Kappasphere Re Bar,Little Chromies and GXP floormats
Magnaflow Exhaust
Mr Z Billet fluid caps
Nakid Stainless Turbo Cover
MBRP SS rear fascia insert
Stubby Antenna
Jay's Windscreen
Clear Bra
Custom engine cover
Painted Calipers with GXP logo and Red Arrowheads on center caps
It is perfectly normal. The original tips on your old exhaust was chrome inside and out as well you just couldn't tell.
Just clean the outside and don't worry about the inside, otherwise you will drive yourself crazy!
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WooHoo!!! Ordered a loaded Deep GXP (minus smokers package) on March 19th, 2008. Order number 0814D93708
Event code 3400 on April 12, 2008
Born April 30, 2008 (VIN 1G2MF35X58Y130283)
Delivered to dealer May 23th, 2008
Delivered on May 27, 2008
I think I'm in love...
Mods: lose the chicklets, VentureShield, Dual horns, AfterShock spoiler, Weathershield cover, Lil Chromies and red calipers with black Solstice stickers!
Its so normal in fact that I know of at least one admin on this board who painted the inside of the exhaust tips flat black so it wouldnt annoy him so much
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************************** MAKO Sly Sand Steel, Power and Convenience Package A/C, LSD, ABS, 5 spd, polished Monsoon single CD
Mods: Little Chromies, Kappa Matts, Kappashield, GM CAI, KS Alum Pedals, B-series stubby antenna.
Shorty header and hi-flow converter (clearimage) Magnaflow Cat-back
__________________ Aggressive GXP at $25,995.00 shipping of $600, Manual Transmission.
Options:
Air, $960; Chrome Wheels, $545; PCQ, Premium Package (Leather), $525; Radio, 6-Disc with MP3, $495; Monsoon, $395; Premium Acoustic Headliner, $150; and Sport Metallic Pedals, $115; all totals $29,180.00. No XM/OnStar and NO Spoiler. MODS (RKSport/Magnaflow dual exit exhaust system, K&N filter, Ventureshield.
First 1000. Aggressive with everything, NO XM/OnStar. SOLD
~~~~~~~ NASSOA
Founding member
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It is perfectly normal. The original tips on your old exhaust was chrome inside and out as well you just couldn't tell.
Just clean the outside and don't worry about the inside, otherwise you will drive yourself crazy!
I cleaned them daily ... for the first month, but got tired of the constant "battle." Mines a daily driver, so I am use to the soot now. I only clean them on special occasions and wash days now.
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2007 Aggressive GXP (Manual) loaded minus On* and Smoker's Pkg (Born 11/10/2006 and picked up on 11/22/2006)
Common problem with any turbo... that I know of. I just leave it be and clean the outsitde of my 3" Magnaflow to be shiny
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2007 Cool GXP - Club Sport package
MODS: shortened WG rod, Cross-drilled/slotted rotors, painted calipers w/GXP decals, Pontiac decal on wheel hubs, Stubby antenna, 3" Magnaflow catback system..sweeeet.. PCMforless tune... super sweet...more to come
I cleaned them daily ... for the first month, but got tired of the constant "battle." Mines a daily driver, so I am use to the soot now. I only clean them on special occasions and wash days now. 
Linear Mode
