New exhaust turning yellow???

SILVERKNIGHT7 · 03-24-2013, 03:17 AM

Hey guys, a few days ago I installed an Injen cat back exhaust and the welds and inside of the exhaust tips are turning a gold/yellow color. Is this normal? I've had other stainless steel exhaust systems and this did not happen. The rear mufflers sit low like the ones on the fast intentions exhaust and with the the welds turning colors it doesn't look right from the rear of the car. Anybody have any suggestions or thoughts?

DEpointfive0 · 03-24-2013, 03:20 AM

Pics?
And does it come off with Mother's Metal Polish?

(BTW, your problem sounds pretty normal)

SILVERKNIGHT7 · 03-24-2013, 07:27 AM

Haven't tried to see if it would come off because I haven't had time. I'll try to get some pics later today. The exhaust only has about 50 miles on it and I can't see how or why the exhaust would turn gold like that. I do hope its normal because the exhaust fits and sounds great.

FairladyZ · 03-24-2013, 07:40 AM

All exhaust turns gold when heated

Only the tips outside will stay stainless

edub370 · 03-24-2013, 10:56 AM

Mothers Polish FTW

Mandingo · 03-25-2013, 11:08 AM

normal

G37sHKS · 03-25-2013, 11:56 AM

Nothing to worry about.

Sh0velMan · 03-25-2013, 12:00 PM

that's why my new exhaust is getting ceramic coated black as soon as I get it.. :P

Not really why, but yeah. It won't be discoloring haha.

SILVERKNIGHT7 · 03-25-2013, 01:18 PM

Thank you to all who replied to my question I really appreciate the help. I emailed Injen as well and they assured me it was completely normal and I had nothing to worry about. I also found some pictures of other cars with the same exhaust and theirs is doing the same thing. I don't really like it but at least I know its normal.

Thanks again

SS_Firehawk · 03-25-2013, 04:00 PM

make sure you post a review, pics and video since there is no info on this exhaust

Motion Lab · 03-25-2013, 04:05 PM

Quote:

Originally Posted by Sh0velMan

that's why my new exhaust is getting ceramic coated black as soon as I get it.. :P

Not really why, but yeah. It won't be discoloring haha.

I wouldn't really bother doing the catback portion. That's essentially heat suppression on the one part of the exhaust that gets pretty good air flow as is. Ceramic coatings are much more appropriate on exhaust manifolds and test pipes that will be radiating heat up into the engine bay which will heatsoak the motor. The coatings do look really nice, however I think the $$$ for performance gained from coating a catback is very minimal.

In the long run though as I always tell my customers, do what makes you happy!

Thanks,
Alex Goodwin
AlexG@motionlabtuning.com

Sh0velMan · 03-25-2013, 04:15 PM

Quote:

Originally Posted by Motion Lab

I wouldn't really bother doing the catback portion. That's essentially heat suppression on the one part of the exhaust that gets pretty good air flow as is. Ceramic coatings are much more appropriate on exhaust manifolds and test pipes that will be radiating heat up into the engine bay which will heatsoak the motor. The coatings do look really nice, however I think the $$$ for performance gained from coating a catback is very minimal.

In the long run though as I always tell my customers, do what makes you happy!

Thanks,
Alex Goodwin
AlexG@motionlabtuning.com

Oh it'll be cheapo coatings, only my headers get the good stuff. Just want to seal the metal against moisture because.... I'm also wrapping the entire thing with cheapo wrap. I'm doing everything I can to keep radiant heat down, as I get tired of cooking in the car. I know it's stainless, but it's easy and cheap to provide another layer of corrosion resistance.

Total supplies spent will be in the neighborhood of $50-60. Absolutely nothing in the grand scheme of things for this build..

03-24-2013, 03:17 AM	#1 (permalink)
SILVERKNIGHT7 Base Member Join Date: Aug 2012 Location: TEXAS Posts: 71 Drives: 2011 NISSAN 370Z Rep Power: 13	New exhaust turning yellow??? Hey guys, a few days ago I installed an Injen cat back exhaust and the welds and inside of the exhaust tips are turning a gold/yellow color. Is this normal? I've had other stainless steel exhaust systems and this did not happen. The rear mufflers sit low like the ones on the fast intentions exhaust and with the the welds turning colors it doesn't look right from the rear of the car. Anybody have any suggestions or thoughts?

03-24-2013, 03:20 AM	#2 (permalink)
DEpointfive0 Premium Member Bitches Join Date: Jan 2012 Location: SoCal Posts: 14,824 Drives: a lot Rep Power: 17151	Pics? And does it come off with Mother's Metal Polish? (BTW, your problem sounds pretty normal) __________________ Do YOU want to know what/where I got my username from? ( Click to show/hide ) NSFW due to language:

03-24-2013, 07:27 AM	#3 (permalink)
SILVERKNIGHT7 Base Member Join Date: Aug 2012 Location: TEXAS Posts: 71 Drives: 2011 NISSAN 370Z Rep Power: 13	Haven't tried to see if it would come off because I haven't had time. I'll try to get some pics later today. The exhaust only has about 50 miles on it and I can't see how or why the exhaust would turn gold like that. I do hope its normal because the exhaust fits and sounds great. Last edited by SILVERKNIGHT7; 03-24-2013 at 07:34 AM.

03-24-2013, 10:56 AM	#5 (permalink)
edub370 A True Z Fanatic Join Date: May 2011 Location: KCMO Posts: 3,458 Drives: 09 370z S/T 6MT Rep Power: 20	Mothers Polish FTW __________________ 09 370Z ST 6MT//Injen CAI//Greddy CBE//TP//TSW's//Swifts//Stillen lip//Whiteline sways 326whp/268tq

03-25-2013, 11:08 AM	#6 (permalink)
Mandingo Track Member Join Date: Nov 2010 Location: Dallas Posts: 625 Drives: '10 370z 6spd Rep Power: 3371	normal __________________ some mods

03-24-2013, 07:40 AM	#4 (permalink)
FairladyZ Track Member Join Date: Jan 2009 Location: Los Angeles Posts: 850 Drives: 2012 370Z TRNG SPRT Rep Power: 17	All exhaust turns gold when heated Only the tips outside will stay stainless

03-25-2013, 11:56 AM	#7 (permalink)
G37sHKS A True Z Fanatic Join Date: Feb 2010 Location: Dubai Posts: 1,183 Drives: 09 G37S Coupe 7AT Rep Power: 20	Nothing to worry about. __________________ G37 BUILD UNDER CONSTRUCTION

03-25-2013, 12:00 PM	#8 (permalink)
Sh0velMan A True Z Fanatic Join Date: Jan 2012 Location: Dallas/Ft.Worth Posts: 3,349 Drives: Noisily. Rep Power: 20	that's why my new exhaust is getting ceramic coated black as soon as I get it.. :P Not really why, but yeah. It won't be discoloring haha. __________________ Buy My Car! \| Build Thread

03-25-2013, 01:18 PM	#9 (permalink)
SILVERKNIGHT7 Base Member Join Date: Aug 2012 Location: TEXAS Posts: 71 Drives: 2011 NISSAN 370Z Rep Power: 13	Thank you to all who replied to my question I really appreciate the help. I emailed Injen as well and they assured me it was completely normal and I had nothing to worry about. I also found some pictures of other cars with the same exhaust and theirs is doing the same thing. I don't really like it but at least I know its normal. Thanks again

03-25-2013, 04:00 PM	#10 (permalink)
SS_Firehawk Premium Member Join Date: Oct 2011 Location: Tampa Posts: 4,142 Drives: 13' Magma Red Nismo Rep Power: 7335	make sure you post a review, pics and video since there is no info on this exhaust __________________ Old Car:GTM TSC'd 550whp / 410lbft tq @ 11.88PSI New Car: Under Construction

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