Exotic Muscle headers
Thread Starter
Racer
Joined: Aug 2011
Posts: 343
Likes: 10
Exotic Muscle headers
Hey, has anyone used these headers on their lt1?
http://emracingcorp.com/scripts/prod...p?idproduct=69
If so, were there any issues other than moving the cats?
http://emracingcorp.com/scripts/prod...p?idproduct=69
If so, were there any issues other than moving the cats?
Race Director
Joined: Nov 2003
Posts: 12,221
Likes: 446
From: Overland Park Kansas
2020 Corvette of the Year Finalist (appearance mods)
C4 of Year Winner (appearance mods) 2019
Notice that link is for header extentions, not headers. The headers show $771. EM (Merle) typically has a GP going where he sells them in the upper $600s (IIRC). So, ask about that if you call.
There are plenty of people who've installed these headers and are very happy with fitment.
Yes, you'll have to remove or relocate cats. If you get a set w/o AIR hookups, you'd have to deal with that too. And, as usual with most header installations, you'll need to redo an accessory brace or two.
There are plenty of people who've installed these headers and are very happy with fitment.
Yes, you'll have to remove or relocate cats. If you get a set w/o AIR hookups, you'd have to deal with that too. And, as usual with most header installations, you'll need to redo an accessory brace or two.
Race Director
Joined: Apr 2000
Posts: 15,344
Likes: 4,009
From: Texas
Hey, has anyone used these headers on their lt1?
http://emracingcorp.com/scripts/prod...p?idproduct=69
If so, were there any issues other than moving the cats?
http://emracingcorp.com/scripts/prod...p?idproduct=69
If so, were there any issues other than moving the cats?
Some cars need the following, some don't (not that big of a deal to do):
Driver's side engine mount bracket clearance:
Passenger side frame cross-brace clearance:
Random Technology bullet cats on EM extensions that fit to a Corsa exhaust:
Passenger side of my LT4 with EM headers:
Race Director
Joined: Nov 2003
Posts: 12,221
Likes: 446
From: Overland Park Kansas
2020 Corvette of the Year Finalist (appearance mods)
C4 of Year Winner (appearance mods) 2019
Race Director
Joined: Apr 2000
Posts: 15,344
Likes: 4,009
From: Texas
Race Director
Joined: Sep 2001
Posts: 14,676
Likes: 751
From: NEwhere Ohio
<snicker> You're not moving the cats, you're removing them or replacing them with bullet cats. I suppose you could cut giant holes in the transmission tunnel if you wanted to relocate the factory cats aft.
Some cars need the following, some don't (not that big of a deal to do):
Driver's side engine mount bracket clearance:
Passenger side frame cross-brace clearance:
Random Technology bullet cats on EM extensions that fit to a Corsa exhaust:
Passenger side of my LT4 with EM headers:
Some cars need the following, some don't (not that big of a deal to do):
Driver's side engine mount bracket clearance:
Passenger side frame cross-brace clearance:
Random Technology bullet cats on EM extensions that fit to a Corsa exhaust:
Passenger side of my LT4 with EM headers:
Also, is there a scavenger spike in-between where the primary tube comes together?
Race Director
Joined: Nov 2003
Posts: 12,221
Likes: 446
From: Overland Park Kansas
2020 Corvette of the Year Finalist (appearance mods)
C4 of Year Winner (appearance mods) 2019
Race Director
Joined: Apr 2000
Posts: 15,344
Likes: 4,009
From: Texas
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Race Director
Joined: Apr 2003
Posts: 17,700
Likes: 1,667
From: moraga ca
ARH makes a stepped header, 1 3/4-1 7/8 which I use. It has the merged collector spike you are looking for. These headers were good for a tenth to a tenth and a half reduction in the quarter over 1 3/4 Hookers in my car.
Pro
Joined: May 2008
Posts: 670
Likes: 55
I have them on my 93 LT1, very nice headers. Only fitment "problems", I had to reverse the motor mount bolts so that the nut is now screwed on from the front of the car. It's also a little difficult getting the second header bolt from the front of the motor on pass side started, start it first before all the others or it won't go in. The header flanges were pretty crooked, had to take a belt sander to them and use Percy's header gaskets to get a good seal with no leaks. You will love the improvement in hp, and tq and the sound is nice too.
It's not an easy job getting the old iron headers off. Especially the bell housing bolts near the top that hold the cat mounts, it's difficult but not impossible. I had to raise the motor, remove both motor mounts, then lower the motor to get to those 4 bolts.
It's not an easy job getting the old iron headers off. Especially the bell housing bolts near the top that hold the cat mounts, it's difficult but not impossible. I had to raise the motor, remove both motor mounts, then lower the motor to get to those 4 bolts.
Drifting
Joined: May 2007
Posts: 1,426
Likes: 165
From: Motor City
I did not have a positive experience with EM headers. I still have not gotten the header flanges to seal properly, but have given up because im sick of pulling them in and out. The drivers header fit was fine but the passenger i've had problems with. I had to heat and bend one of the primary tubes as it interfered with my upper control arm.
For the price, and especially since they are not stainless, i think there are better options.
I'm just one guy though, there have been other people with positive experiences.
For the price, and especially since they are not stainless, i think there are better options.
I'm just one guy though, there have been other people with positive experiences.
Race Director
Joined: Feb 1999
Posts: 12,772
Likes: 17
From: Indianapolis IN
I did not have a positive experience with EM headers. I still have not gotten the header flanges to seal properly, but have given up because im sick of pulling them in and out. The drivers header fit was fine but the passenger i've had problems with. I had to heat and bend one of the primary tubes as it interfered with my upper control arm.
For the price, and especially since they are not stainless, i think there are better options.
I'm just one guy though, there have been other people with positive experiences.
For the price, and especially since they are not stainless, i think there are better options.
I'm just one guy though, there have been other people with positive experiences.
