1 3/4" vs 1 7/8" headers?

[KBLEO]

Wondering what gains people here have had between the 1 3/4" vs 1 7/8" long tube headers on naturally aspirated 5.0 motors? Please discuss...

 

[hopony]

SW 1 7/8 with cat delete I gained 25 hp and 35 tq

 

[KBLEO]

Nice gains. SW makes a great, quality product.

 

[jymboslice]

Nice gains. SW makes a great, quality product.

Fitment kinda sucks though

 

[KBLEO]

I was wondering if there is much difference in horsepower/torque between the 2 sizes. I was kind of suprised that many 5.0's seem to run 1 7/8" long tubes, same size as I ran on my 7 liter Z06.

 

[byeofcr]

Id think its neglible. When i ordered mine i was thinking of getting the smaller size but went bigger in case i go blown down the road.

 

[sean04]

Stock Motor 1 3/4" Vs. 1 7/8 Engine Dyno Results!! - LS1TECH

I know its not a 5.0, but it is a small cube NA motor. the 1 7/8 headers gave up nothing down low and outperformed the smaller 1 3/4 up top

 

[kona 199]

what bout the install on the long tubes?i hear its bad and i had one guy tell me he did it at home shop with four jack stands.

 

[sean04]

what bout the install on the long tubes?i hear its bad and i had one guy tell me he did it at home shop with four jack stands.

Install difficulty depends on the longtube brand, but its fairly easy. Ive done quite a few sets on my back in the garage. Just drop the k and its all right there. I couldnt image doing it with the k on like some of these guys do. Its just too easy to drop it, I can have the k member on the ground within 40 minutes or so. Its even easier with the newer mustangs since it has an electric rack, so oil lines to deal with, just unplug it

 

[hopony]

what bout the install on the long tubes?i hear its bad and i had one guy tell me he did it at home shop with four jack stands.

We did it without dropping the k member in about 6 hours. Drivers side wasn't bad. Passenger side took a little work to get into place and the front stud is fun being right behind the ac line. Cj pony parts has a nice video if you want to see what is involved.

 

[RC-5.0]

I gained 40TQ @ 3500RPM and over 25 across the curve with 1-7/8"on motor. I would have gotten 3/4, but I will be putting a TVS on soon, so I was "prepping" the car for it.


RC

 

[preciousroy]

I drove an '11 with full exhaust from longtubes back on stock tune. Obviously it was much faster than my stock '13, but the real shocker was the low/midrange difference. The car was a completely different animal driving around town, and it was a 3.31 rear to my 3.55's. Thats why im sold on longtubes.

 

[blackbeast12]

Kooks 1 and 7/8 super street shorties!

 

[jymboslice]

Kooks 1 and 7/8 super street shorties!

This.


I really, really wish I would have bought these instead of my SW longtubes.

 

[jojobee]

When i bought my ARH longtubes i asked a few tuners about the differences between 13/4 and 1 7/8 and one (JDM) swore to me me that everytime you have have a car under 800 rwhp they were seeing the 1 3/4 perform better as the bigger tubes were giving some power down low.

I know some have said the opposite but thats what they told me..

I honestly think either sizes are good and anybody should be happy with these.

I was certainly happy with my ARH 1 3/4 but switched to the Kooks superstreet to comply more easily with the new regulations in effect in my area.

 

[KBLEO]

Glad to see the replies. Think I am leaning towards the 1 7/8" long tube headers, never now when extra cash may fall into your lap and you accidentally buy a supercharger. :-D

 

[byeofcr]

I didnt drop the kmember and it took me a longgggg time even with a lift but i never put headers in and in hindsight i could easily cut the time in half. Go 1 7/8 and dont look back sound alone was worth it and im catted

 

[kona 199]

thanks for the tips.i think i ll order the jba 1 7/8 in chrome!

 

[DNT H8]

Most of the large gains comes from the cat delete "they say". I really wish someone had numbers with just a LT install, no mid pipe or cat delete variable.

 

[beefcake]

we are running a big sale on the sw, sp, kooks, arh, and pypes