I have finally saved up the dough to buy a set of headers and I think I wanna go with hookers. But the problem is that the only set I can find WITH the y-pipe is #2055, which has 5/8 primaries. 5/8s are too small for a 3fifty right? Im in a fix, anyone know if I can find a 3/4 header WITH the y-pipe?

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'83 Firebird 2.8
'89 Firebird Formula 350
2nd owner, red/grey, t-tops, dual cats, and a 3.27:1 rear
K&N, TB bypass, No MAF screens, CAI

 

I don't think the 1 5/8" primaries are too small for a 350. I know that the SLP headers also come with a Y-pipe, and you can get them with 1 3/4" primaries and with or w/out the AIR tubes.m They're more expensive, but they're also made out of stainless steel, so they'll never rust. However, getting regular headers coated will keep them from rusting -and- keep more of the heat inside the headers and out of the engine compartment.

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Greg Westphal
'87 IROC 305TPI/A4

 

the hooker 1 3/4 are long tubes...the slp 1 3/4 come with a y pipe but are shorties. the hooker 1 3/4 y pipe has to be made by muffler company or bought from mufflex (250) but the hookers are better. cuz they are LTs

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Rick
90 Camaro RS 305 TBI
400 small block, Hooker 1 3/4 LTs, Random Tech Cat, Hooker aero chamber cat back on the way!!
TH700-R4 with Trans-Go shift kit (corvette servo here...but not installed yet)
MacEwen Motorsports White Gauge Overlays
14" K&N X-Stream Open Element
GTS Headlight and Taillight covers
5% Limo Tint all around
Classic White Chevy Bowtie sticker on rear window
http://www.geocities.com/esvalenz

Man if my camaro were a rice-rocket all those mods would give me what...easily 50-60 hp!!!

"Just because I've done it, doesn't mean I knew what I was doing!" - Me

 

s

 

I built a 406 patterned after an article I read in Chevy High Performance mag about a year ago. It uses 1 5/8 primarys into 2 1/2" mandrel bent duals. Through the exhaust it cranked out 500lbs of torque and 465hp! My engine combo is identical except I used shorty Hedmann headers, Hedmann Y-pipe and a single 3" mandrel bent Flow Master Catback system. I wouldn't consider putting duals on my car with this engine. I don't think it would be worth it. The area of the single 3" pipe is equal to a little less than two 2 1/4" mandrel bent duals. I figure I'm giving up a little power over 6,000 rpm but around 6,000 is where my engine peaks anyway. Hope this helps you decide.

 

I ran 1 5/8" full length Hedmans with 3" collectors on my 383 race car and still ran high 11's.

And like chevyii said. Unless you plan on going over 6000 rpm, 1 5/8" will be just fine.

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Stephen's racing page

87 IROC-Z Pro ET Bracket Race Car
383 stroker (carbed) with double hump cast iron heads and pump gas
454 Big Block buildup now in progress for the 2001 racing season

Best results before the 383 blew up
Best ET on a time slip: 11.857 altitude corrected to 11.163
Best MPH on a time slip: 117.87 altitude corrected to 126.10
Altitude corrected rear wheel HP based on power to weight ratio: 476.5
Best 60 foot: 1.662

Racing at 3500 feet elevation but most race days it's over 5000 feet density altitude!
Member of the Calgary Drag Racing Association

87 IROC bracket car, 91 454SS daily driver, 95 Homebuilt Harley

 

i have 1 3/4" primarie son my SLP stainless headers, and they came with the y-pipe.

might want to check them out.

-brian

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1991 Camaro RS - Ultra Blue Metallic, T-Tops
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GM 350 HO Crate Engine - Vortec Heads, Edelbrock Performer Vortec Intake, Holley 670 CFM Throttle Body, Open Air Cleaner w/14"x3" K&N, SLP 1 3/4" Stainless Headers, Edelbrock Victor Series Water Pump, MSD 6AL, Blaster Coil, 8.5mm Super Conductors, Accel Cap and Rotor, Hypertech Fan Switch & Thermomaster Chip, AC Delco Rapidfires, 3" Cat Back, Flowmaster 40 Series Muffler

700R4 - 2,400 Stall Converter, Vette Servo, Shift Kit, B&M Super Cooler

Brian's 1991 RS
Central NY F-Body Association
Join the Third Generation F-Body TBI Web Ring
z28boy@twcny.rr.com IM name: Z28 Boy

 

Chevyii..I have that 406 article from CHP. That was one killer SB!

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Black 90 IROC, L98, A4, 323 gear. SuperRamed 406 in the works!