Headers & Engine Size

marcfiebka · May 27th, 2007, 10:57 PM

Couple questions:

1. I see numbers like 302 351 etc when referring to engines. What do these numbers mean? And what number are 4.6L GTs?

2. Will long tube headers make me not pass emissions? I live in Arizona. I had my heart set on some LTs but I hear theyre a bitch to install and if I have to take them off every 2 years...I dont want to get them.

Thanks for any input

HMUSN · May 27th, 2007, 11:00 PM

Couple questions:

1. I see numbers like 302 351 etc when referring to engines. What do these numbers mean? And what number are 4.6L GTs?

they are refering to the cubic inches of the engine.
our 4.6's are 281s

2. Will long tube headers make me not pass emissions? I live in Arizona. I had my heart set on some LTs but I hear theyre a bitch to install and if I have to take them off every 2 years...I dont want to get them.

yes they are illegal and yes they are a bitch to install

Thanks for any input

no problem

marcfiebka · May 27th, 2007, 11:13 PM

any way to have long tubes and pass emissions?

Racinjason81 · May 28th, 2007, 12:25 AM

if the headers have a CARB # they should pass as long as you get
a matching H or X with cats.

Racinjason81 · May 28th, 2007, 12:26 AM

if the headers have a CARB # they should pass as long as you get
a matching H or X with cats.

chris1 · May 28th, 2007, 01:00 AM

to be honest with you from the research i've done i don't think any long tubes are capable of passing smog. Even if you have emission legal cats...(feel free to correct me if im wrong)

chris1 · May 28th, 2007, 01:01 AM

and not to mention the guys on here as well who provided 80% of the info..

02StangGToWNEr · May 28th, 2007, 01:34 AM

Originally Posted by marcfiebka

any way to have long tubes and pass emissions?

That all depends on how strict your emissions are. I know here in NY LT's make it hard to pass, but I have heard it can be done.

Drgnracin72 · May 28th, 2007, 01:50 AM

get to know someone who does the testing and maybe they can turn their head at just the right moment and poof you pass!!!! im lucky i dont have emission testing

MustangMatt96GT · May 28th, 2007, 11:27 AM

Yeah where I register my car I dont have to pass emissions, but if I had to pass in Denver I doubt I would!

May 27th, 2007, 10:57 PM	#1
marcfiebka Regular Join Date: Apr 2007 Posts: 196 iTrader: 0 reviews	Headers & Engine Size Couple questions: 1. I see numbers like 302 351 etc when referring to engines. What do these numbers mean? And what number are 4.6L GTs? 2. Will long tube headers make me not pass emissions? I live in Arizona. I had my heart set on some LTs but I hear theyre a bitch to install and if I have to take them off every 2 years...I dont want to get them. Thanks for any input

May 27th, 2007, 11:00 PM	#2
HMUSN Doc 1986 SVO 48.47@ 12.58 Join Date: Nov 2006 Posts: 37,050 iTrader: 11 reviews	Couple questions: 1. I see numbers like 302 351 etc when referring to engines. What do these numbers mean? And what number are 4.6L GTs? they are refering to the cubic inches of the engine. our 4.6's are 281s 2. Will long tube headers make me not pass emissions? I live in Arizona. I had my heart set on some LTs but I hear theyre a bitch to install and if I have to take them off every 2 years...I dont want to get them. yes they are illegal and yes they are a bitch to install Thanks for any input no problem __________________

May 28th, 2007, 12:25 AM	#4
Racinjason81 Hardcore Enthusiast Join Date: Feb 2007 Location: New jersey Posts: 1,559 iTrader: 0 reviews	if the headers have a CARB # they should pass as long as you get a matching H or X with cats. __________________ Heres a real funny video youtube.com/watch?v=ojB7KkaR03I VTEC stands for Very Torqueless Economy Car Honda stands for Hold On Not Done Accelerating 1991 LX 5.0 H/B(T-70 turbo coming soon)

May 28th, 2007, 12:26 AM	#5
Racinjason81 Hardcore Enthusiast Join Date: Feb 2007 Location: New jersey Posts: 1,559 iTrader: 0 reviews	if the headers have a CARB # they should pass as long as you get a matching H or X with cats. __________________ Heres a real funny video youtube.com/watch?v=ojB7KkaR03I VTEC stands for Very Torqueless Economy Car Honda stands for Hold On Not Done Accelerating 1991 LX 5.0 H/B(T-70 turbo coming soon)

May 28th, 2007, 01:50 AM	#9
Drgnracin72 I Post Entirely Way Too Much Join Date: Jan 2006 Location: somewhere in oklahoma Posts: 10,635 iTrader: 2 reviews	get to know someone who does the testing and maybe they can turn their head at just the right moment and poof you pass!!!! im lucky i dont have emission testing __________________ RIP ΜΟΛΩΝ ΛΑΒΕ Political Correctness is a doctrine, fostered by a delusional, illogical, liberal minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a turd by the clean end. One Big Ass Mistake America SHEEPDOGS

May 27th, 2007, 11:13 PM	#3
marcfiebka Regular Join Date: Apr 2007 Posts: 196 iTrader: 0 reviews	any way to have long tubes and pass emissions?

May 28th, 2007, 01:00 AM	#6
chris1 Banned 2003 Ford Mach Traveling at the speed of a photon Join Date: Feb 2007 Location: Los Angeles, California Posts: 851 iTrader: 0 reviews	to be honest with you from the research i've done i don't think any long tubes are capable of passing smog. Even if you have emission legal cats...(feel free to correct me if im wrong)

May 28th, 2007, 01:01 AM	#7
chris1 Banned 2003 Ford Mach Traveling at the speed of a photon Join Date: Feb 2007 Location: Los Angeles, California Posts: 851 iTrader: 0 reviews	and not to mention the guys on here as well who provided 80% of the info..

May 28th, 2007, 11:27 AM	#10
MustangMatt96GT Proud American 1996 Mustang GT Join Date: Dec 2006 Location: Lakewood, CO Posts: 10,690 iTrader: 3 reviews	Yeah where I register my car I dont have to pass emissions, but if I had to pass in Denver I doubt I would! __________________ RIP Travis Billings Special Thanks to: Andrews Racing Transmissions Baseline Suspensions 25.3 SFI Chassis Build Never Lift Racecars

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