grocerygetter

iTrader: (2)

I have a set of ls3 valve covers and coil brackets...did I read that the 2004 ls6 coils are a different bolt spacing than the 2010 up ls3s? will my coil bracket off the ls6 bolt to the valve covers though? I was going to buy holley valve covers like I did for my ls3 but I heard about the coils being a different bolt spacing.

tuckin22

Not sure if this helps.. but I thought the LS1/LS6's were the same... (I have LS1 coils) I put LS3 covers and holes were no where near...

grocerygetter

iTrader: (2)

I think ls1/6/2 all same

Paul Bell

iTrader: (9)

With the exception of 97/98 valve covers which have coils bolted directly to the covers, all LS valve covers will accept the various ignition coil brackets that GM used.

5.0 LsX

iTrader: (7)

they are a diff spacing

grocerygetter

iTrader: (2)

cool. so the dumb thread gleaned some good info. coil packs are different bolt spacing, but the oem valve covers swap out as long as you swap the coil pack brackets.

Paul Bell

iTrader: (9)

GM valve covers with coils bracket mounted all have the same threaded stand-offs that the various brackets bolts to. This allows the different coils that GM used to not require different valve covers.

The Holley covers have threaded stand-offs that the coils bolt directly to, LS3 coils are required.

It's a disadvantage to have coils bolted directly to the covers. Doing work such as exhaust bolts or spark plugs is way easier when you remove the coils as one unit.

Paul Bell

iTrader: (9)

Yessir.

grocerygetter

iTrader: (2)

Thanks guys.

tuckin22

I guess this was my case... had perimeter bolt covers.. Good to know though.. Helped OP though

Paul Bell

iTrader: (9)

Yeah, sorry, you're stuck with the original coils with those covers. Not that they're bad coils, they all work pretty well.