what is the best performance exhaust and who makes it?? : MGB & GT Forum : The MG Experience

what is the best performance exhaust and who makes it?? #1
adam1476 Adam Vadeboncoeur Morehead City, NC, USA Sign in to contact 1963 MG MGB	Topic Creator (OP) Aug 24, 2014 09:37 AM Joined 13 years ago 301 Posts

I am looking at purchasing a complete performance exhaust system for my 63B. So what is the best system, and who makes it??

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Re: what is the best performance exhaust and who makes it?? #2
wyatt Wyatt W penguin point, Michigan...drift ice, Antarctica Sign in to contact 1957 Porsche 356 1958 Alfa Romeo Giulietta 1958 Alfa Romeo Giulietta 1960 MG MGA & more	Aug 24, 2014 09:40 AM Joined 20 years ago 44,669 Posts

....stebro.... smoking smiley

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Re: what is the best performance exhaust and who makes it?? #3
adam1476 Adam Vadeboncoeur Morehead City, NC, USA Sign in to contact 1963 MG MGB	Topic Creator (OP) Aug 24, 2014 09:46 AM Joined 13 years ago 301 Posts

What is Stebro?

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Re: what is the best performance exhaust and who makes it?? #4
9146 rick dentel yardley, PA, USA Sign in to contact 1970 Porsche 914 1978 MG MGB 1998 Jeep Cherokee 2001 Jeep Cherokee & more	Aug 24, 2014 10:00 AM Joined 14 years ago 3,966 Posts

An exhaust system.

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Re: what is the best performance exhaust and who makes it?? #5
Steve64B Steve Opitz Phoenix, AZ, USA Sign in to contact 1966 MG MGB	Aug 24, 2014 10:44 AM Joined 19 years ago 11,646 Posts

Google "Stebro Exhaust" for business reviews!!

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Re: what is the best performance exhaust and who makes it?? #6
Bee Sting Jay D Lytle, TX, USA Sign in to contact 1965 Dodge B-Series Van "A100 Custom Sportsman" 1977 MG MGB MkIV "The Midge"	Aug 24, 2014 10:49 AM Joined 12 years ago 1,031 Posts

I use a header, straight pipe to an IMCO glasspack at the very rear of the car where the resonator was. It doesn't sound like a ricer, it sounds like a vintage British race car and it's very loud. Many people will try to tell you that my setup reduces performance but hey I'm the one actually driving the car and I can tell you that the car performs way better now! Much zippier!

Jay D
"Bee Sting"
'77 MGB Mk. IV 1800CC
Weber 32/36 DGV Carb
Ported Intake
Pertronix Distributor
Early 70's exhaust manifold
Magnaflow muffler
Driven daily and loved daily
by a poor college student

And yes, the clock works. winking smiley

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Re: what is the best performance exhaust and who makes it?? #7
kirks-auto Robert Kirk (RIP) Davenport, IA, USA Sign in to contact	Aug 24, 2014 11:08 AM Joined 17 years ago 21,573 Posts

Arguably Maniflow, the direct descendent to Downton who were first choice for Works Specials.
http://www.maniflow.co.uk/index.php?view=category&category=182

I know of nothing superior. However, it can be argued with some merit that a street car needs nothing more than a stock manifold. smileys with beer

Regards,
Robert Kirk

kirkbrit@yahoo.com
E-mail PLEASE for quote/questions/orders

Business phone 563 323 1017

http://kirks-auto.com/
Moss distributor/UK importer
Beat or match most retail/delivered quote

MGB STAGEIII L-BORE EXHAUST MANIFOLD CLM063III.jpg 1.3 KB

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Re: what is the best performance exhaust and who makes it?? #8
mowogman Bryan Frazier NC, USA Sign in to contact	Aug 24, 2014 11:34 AM Joined 17 years ago 1,775 Posts

According to Peter Burgess's book, Peco.

• 70 MGB • 77 MGB • 06 Cooper S • 09 Triumph T100

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Re: what is the best performance exhaust and who makes it?? #9
LannM Lann Mauck Verdigris, OK, USA Sign in to contact 1958 MG Magnette ZB Varitone "The Queen" 1963 MG MGB 1967 MG MGB GT	Aug 24, 2014 12:35 PM Top Contributor Joined 20 years ago 1,311 Posts

Anytime you ask "what's the best (fill in the blank)" you are going to get a ton of different answers.

Tell us what you plan on using the car for and what you want to get out of it. You'll still get a ton of answers but they will be more useful.

Lann

Lann Mauck
Three Main LLC
Desktop Badge Bars and other odds and ends
www.ThreeMainLLC.com

Three Main LLC ThreeMainLLC.com

Desk Top Badge Bars, GT Spare Tire Cover Strut Kits, Dipstick Toppers and other odds and ends.

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Re: what is the best performance exhaust and who makes it?? #10
adam1476 Adam Vadeboncoeur Morehead City, NC, USA Sign in to contact 1963 MG MGB	Topic Creator (OP) Aug 24, 2014 12:41 PM Joined 13 years ago 301 Posts

I am looking to get as much performance out of it as possible. I am rebuilding the engine with a performance street cam, new pistons, rings, rebuilt cabs. Completely rebuilt head slightly milled to increase compression.

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Re: what is the best performance exhaust and who makes it?? #11
ohlord Rob C A tiny Island off the coast of Washington State, N.W., USA Sign in to contact 1957 Land Rover Series I "EYEYIYI" 1957 Land Rover Series I "OVRLND" 1971 MG MGB 1971 MG MGB "Bedouin 2" & more	Aug 24, 2014 12:59 PM Top Contributor Joined 14 years ago 28,879 Posts

If you aren't going above 9.5:1 compression matched with a cam capable of breathing in and out more cfm,the stock cast iron manifold and 1.75 in pipes works fine. You aren't racing it and the torque curve should stay down low where the engine lives.
Big bore systems on a slightly skimmed head engine are a waste of time.
Sound nice thumbs up

LNDRVR4X4.COM
Home of Project "INCARN8'

1957 Series 1 Land Rover electric VEHICLE CONVERSION

FIXITUPCHAP.COM
FIXITUPCHAP INCORPORATED

RD3 Radar/ Electronic Warfare Technician
VIETNAM 1969-1972

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Re: what is the best performance exhaust and who makes it?? #12
Benny Ben E San Diego, CA, USA Sign in to contact 1964 Ford Cortina 1964 Land Rover Series IIA 1965 Ford Cortina 1965 MG MGB & more	Aug 24, 2014 01:03 PM Top Contributor Joined 20 years ago 7,531 Posts

In reply to # 2778070 by adam1476 I am looking to get as much performance out of it as possible. I am rebuilding the engine with a performance street cam, new pistons, rings, rebuilt cabs. Completely rebuilt head slightly milled to increase compression.

So it sounds like a stock rebuild with a cam and a slight compression bump. How much was milled off the head? No port work I assume, since you didn't mention it? What are the cam specs?

Based on your description alone, it's pretty unlikely that you will gain any noticeable performance from anything other than a stock exhaust manifold, and something like a "stock" Bell or Falcon system.

My '67 GT has a fully ported head, bumped compression, APT VP-11 cam, and a lightened flywheel. When I got the car, it had a. Peco header, and a straight-through exhaust to a "Cherry Bomb". It sounded ridiculous, and I tend to not like headers on street cars. I went back to a ceramic coated factory exhaust manifold, and a Bell system, and I lost NOTHING in performance. I guess the real question at this point is, how much "noise" are you hoping for?

Edited 1 time(s). Last edit at 2014-08-24 01:04 PM by Benny.

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Re: what is the best performance exhaust and who makes it?? #13
glbishop Gary Bishop Spring Hill, FL, USA Sign in to contact 1980 MG MGB MkIV 1984 Kawasaki Z550	Aug 24, 2014 01:36 PM Top Contributor Joined 14 years ago 2,926 Posts

I don't believe you'll find substantial performance gains.
Better to pick the exhaust for it's sound (or lack of sound).

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Re: what is the best performance exhaust and who makes it?? #14
adam1476 Adam Vadeboncoeur Morehead City, NC, USA Sign in to contact 1963 MG MGB	Topic Creator (OP) Aug 24, 2014 01:37 PM Joined 13 years ago 301 Posts

Well lets just say I would like to be able to hear the radio.

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Re: what is the best performance exhaust and who makes it?? #15
Benny Ben E San Diego, CA, USA Sign in to contact 1964 Ford Cortina 1964 Land Rover Series IIA 1965 Ford Cortina 1965 MG MGB & more	Aug 24, 2014 01:56 PM Top Contributor Joined 20 years ago 7,531 Posts

In reply to # 2778119 by adam1476 Well lets just say I would like to be able to hear the radio.

Then get a Falcon or Bell system. It won't sound like a 17 year old owns it, and you won't lose anything in performance.

There's always the Moss TT exhaust, which had some nice design features, but is noisy by some accounts.

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