Flowmaster AMT Catback inlet size? - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

SS-Rider · 01-19-2011, 04:44 PM

Does anybody know the inlet size for the Flowmaster AMT catback? I hate the tips for the ground effects and want to change it to the SLP square tips. I assume its a 3".

caverman · 01-19-2011, 04:50 PM

Should be 2.5" inlet in order to hook up to the factory mid-pipes. However...the overall cat-back is a 3" I believe so if your asking the inlet on the tips it should be 3".

IROCanSS · 01-19-2011, 04:53 PM

You dont want to know the inlet size... you want the outlet size but whatever...

The inlet (at the cats) is 2.5" for about 6" then flares out to 3" and is 3" all the way back and in and out of the mufflers then flares out again to 4" at the tips for the NON gfx kit. So your answer is 3". I think the gfx kit is just 3" without the 4" flare and chrome tip. If you have the GFX kit from Flowmaster you want a 3" tip. You may have to weld it on if the tip is 3" OD. You'd need 3" ID.

I just went out and looked

01-19-2011, 04:44 PM	#1
SS-Rider Drives: 2010 Camaro SS 2SS RS Black Join Date: Mar 2010 Location: cary Posts: 4	Flowmaster AMT Catback inlet size? Does anybody know the inlet size for the Flowmaster AMT catback? I hate the tips for the ground effects and want to change it to the SLP square tips. I assume its a 3".

01-19-2011, 04:50 PM	#2
caverman Drives: '69 SS Convertible Join Date: May 2009 Location: DFW, TX Posts: 7,111	Should be 2.5" inlet in order to hook up to the factory mid-pipes. However...the overall cat-back is a 3" I believe so if your asking the inlet on the tips it should be 3". __________________ *-2010 Camaro* 2SS \| M6 \| VR w/White Stripes \| 1 3/4" KOOKS - 3" Magnaflow \| LPE 3.91 gears \| ADM tuned \| Halltech w/ADM Scoop \| Spohn/BMR Trailing Arm/Toe Rod \| BC Coilovers\| Pedders FE4 ZL1 swaybars \| Cradle/Diff/Radius Rod bushings \| VMax TB \| Morimoto Projectors \| MGW shifter \| Red Calipers Build Journal

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01-19-2011, 04:53 PM	#3
IROCanSS Account Suspended Drives: 89 IROC 350 Join Date: Mar 2009 Location: Back roads, southern Ohio Posts: 12,504 View My Garage	You dont want to know the inlet size... you want the outlet size but whatever... The inlet (at the cats) is 2.5" for about 6" then flares out to 3" and is 3" all the way back and in and out of the mufflers then flares out again to 4" at the tips for the NON gfx kit. So your answer is 3". I think the gfx kit is just 3" without the 4" flare and chrome tip. If you have the GFX kit from Flowmaster you want a 3" tip. You may have to weld it on if the tip is 3" OD. You'd need 3" ID. I just went out and looked