That's what I was thinking.  Especially if going through a seller like Performance Peddler.

Now I'm thinking that the 17749 is going to be too quiet so I'm looking at the Dynomax Ultra Flo 17513.  This is a straight through design with a 20" body.  I'm thinking the 20" body will flow better since the angle of the pipe in side will be less abrupt but it will be a little quieter at the same time.  Does anyone have experience with the Ultra Flo's?

Hi all,

I’m starting to plan out a new exhaust system for my 1967 Mustang and I wanted to get some feedback.  The engine is a fairly stock 427.  The car is a driver/cruiser.  The current system is a straight shot of 2.5” pipe from the headers to 16” turbo mufflers then a 2.25” stock
Below is my current plan and rational.
tailpipe with twin tip resonators.  There is no crossover pipe. 

2.5” mandrel bent pipe – should provide sufficient flow while providing more room for the install
H pipe – From what I’ve read, an H pipe will produce better torque for a street/cruising application opposed to an X pipe.
Dynomax Super Turbo with a 16”or 20” case (17629, 17749) – provides good flow without being annoyingly loud

I like the twin tip look so I may add 2.5” flowmaster tips https://www.flowmastermufflers.com/accessories-and-tips/15307-exhaust-tip-300-in-dual-angle-cut-polished-ss-fits-250-in-tubing-clamp-on/  or 2.5” Jones resonator tips.  https://www.jegs.com/i/Jones-Exhaust/523/JDR212/10002/-1  Jones is the only brand I could find with a 2.5” inlet. 

Originally, I was planning on going with the Magnaflow 15816 Kit https://www.magnaflow.com/products?partNumber=15816 with an X pipe .  I really like the stainless but from what I have been reading this setup will provide good peak power but it kicks in later in the RPM band so might not be as much fun for cruising.  I was also concerned that the Magnaflow Street Series mufflers would be too loud for my taste. 

I have no firsthand experience with any of these products so any insight would be appreciated.  Also, does anyone know if someone sells an application specific stainless exhaust kit minus the mufflers?

I’m looking for a grommet with a 1” OD and 3/4” ID to fit a K&N breather in some old Edelbrock cast aluminum valve covers. The port in the valve covers are 1” across by about 3/8” deep. Neither Edelbrock or K&N could offer any suggestions. I got one from Scott Drake for a ‘67 Mustang with the correct OD/ID but the gap is not wide enough. I trimmed the bottom lip off to fit but the center gap section is rounded so it’s not an ideal fit.  Anyone know of a compatible grommet?

watch that youtube video that roadkill made where they tested i think top twenty air filter combos.you will be surprised by the results.it looks like air from the top makes more power than air from the sides.good video.

Very interesting video.  Thanks for mentioning it.  It's helpful to see side by side comparisons like this.  I love that the old "flip the lid" option really does work. 

Agreed. To find one is the trick! 

I’m trying to increase the air available to the engine in my '67 Mustang.  It’s a 427 with 3 Holley 2 barrel carburetors and a max RPM of around 6,000.  By my calculation I need about 100 sq. in. of filter surface area.

I am currently running a K&N E-1960 1 ¾” filter which, again by my calculation, provides about 50 sq. in. of surface area.  Unfortunately, I don’t have room for the K&N E-1963 3” filter because, height wise, the front of my air cleaner lid is very close to a hood support.  The car has a fiberglass hood with a functional 1966 style hood scoop.  I can see three options for increasing the air flow. 

1)   I bought an air cleaner lid from Cobranda with plans of modifying it with two K&N 66-0901 9" filter lids, one over each outboard carb. https://www.knfilters.com/search/product.aspx?prod=66-0901&pkid=5531932&rw=1

2)   Purchase this set of O’Brien Trucker 2 ½” Air Cleaners.  The front one should clear the brace and sit up into the hood scoop.  https://www.obrientruckers.com/ecom/product/239/2671/

3)   Notch the fiberglass brace on the underside of the hood so that I can fit the original air cleaner with the 3” K&N filter  https://www.knfilters.com/search/product.aspx?prod=E-1963

All of these options will theoretically get me to the 100 cu. in. of surface area.  I’m interested to hear your thoughts on which may be the better option.

I'd be playing the "gee what can I keep" game.

I may just use a piece of 1/2" hose to connect a PCV to the nipple already on the manifold plate to start off with.  I'd like to buy the plate like you have but the guy hasn't gotten back to me if he would sell it separate from the basket.  He sells the baskets separate so why not?

Did you tap yours to a pipe thread?  I don't think I've ever tapped a something for pipe fitting.