2001CamaroGuy

iTrader: (6)

At what point does the 1 7/8" become a big gain over the 1 3/4"? I'm hoping to get 500rwhp out of this new 388 but am wondering if the 1 3/4" Hookers I have are going to have much resistance to flow.

Classic

iTrader: (3)

You might want to check out a set of stepped headers. I believe Kooks recomends anything over 450rwhp you should step up to stepped headers, but I'm not sure you would need to go all the way to 1 7/8 with a 388.

strokedls1

iTrader: (1)

Not going to be a huge gain, but if your looking for a max effort then do the 1 7/8 kooks. Probably worth 10 rwhp.

Pro Stock John

iTrader: (34)

Big bore engine?

I would consider doing 1.875 full length headers.

Blue Hawk

If your goal is maximum peak HP, then go with stepped headers. Otherwise, if you're looking for strong low to mid-range, I'd stay with 1 3/4.

1 7/8 are better suited for 422+ big cubes engines.

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Eric D.
99 Firehawk M6

CHRISPY

I would LOVE to see a full length 1 5/8th header with 3 inch merge collector. I think people tend to go too big on headers. I bet a street engine (idle to 6400rpm) would see big torque increases from a properly built 1 5/8th longtube...

2001CamaroGuy

iTrader: (6)

its a 4.130" bore X stock 3.622" stroke engine. As I said, I'm looking to make 500rwhp but more than that isn't a big deal and I'm not really up to pay $1000+ for new headers unless its REALLY going to get me something (thus if the 1 3/4" headers are going to work then I'll stick with them).

racrx

see sig...i have awsome low and mid range

WILWAXU

iTrader: (6)

1 7/8's work good for me.. stock internals and with the heads & cam.

BOWTIE

Then you should be the first to try a set of the new Hedman stepped headers. If I remember correctly, the are a 1 1/2 stepped to 1 5/8 primary to either a 2 1/2 or 3 collector.

Country Boy

iTrader: (24)

1 7/8 work great for me also being 348 CI

CHRISPY

I already have the 1 3/4 to 1 7/8 edelbrock. 1 1/2 is way too small for an LS1 (especially my 385) but a full 1 5/8 would be great for a stock cubed motor that doesnt go above 6600rpm.