4.1 4" bore forged piston options

[MNcarbturbo]

I've got a stock bore 4.1 block id like to drop a set of forged pistons into.

Full Throttle had a set posted for stock stroke 4" bore but I reached out to check stock status and they are discontinued.

Any other suppliers or anyone have a batch # for a 4" bore stock stroke forged piston?

I'm open to go 3.975-3.995 but I know ring packages get poor in this range.

Thanks!

 

[liquidh8]

2nd this, I am mostly in the same boat except I want to go stroker, have a block @ 3.995, same story with them being discontinued.

 

[THensley]

custom pistons from CP was not a big problem I did not order the it was Dan at DLS 15 years ago

 

[1KWIKSIX]

I thought Earl Brown was able to do some custom sized pistons. Why not reach out to him

 

[BEATAV8]

DSS Racing or Diamond will make whatever you need, custom order. If you need tech help with the ordering, order through Full Throttle Speed.

 

[Reggie West]

Call DSS Racing pistons. Very good to deal with

 

[black 79 sport coupe]

I've got a stock bore 4.1 block id like to drop a set of forged pistons into.

Full Throttle had a set posted for stock stroke 4" bore but I reached out to check stock status and they are discontinued.

Any other suppliers or anyone have a batch # for a 4" bore stock stroke forged piston?

I'm open to go 3.975-3.995 but I know ring packages get poor in this range.

Thanks!

I had a set made for my car. By the way the downpipe I got from you works great .

 

[Undercover87T]

I've got a stock bore 4.1 block id like to drop a set of forged pistons into.

Full Throttle had a set posted for stock stroke 4" bore but I reached out to check stock status and they are discontinued.

Any other suppliers or anyone have a batch # for a 4" bore stock stroke forged piston?

I'm open to go 3.975-3.995 but I know ring packages get poor in this range.

Thanks!

Diamond was the supplier for Full Throttle. Have you reached out to them directly? I have a set of those pistons, 6.350 rods and a stroker crank in my 4.1.

 

[liquidh8]

I have not, though I suppose that's a good plan.

 

[MNcarbturbo]

I reached out to Full Throttle and they are no longer offering custom pistons and the 4.1 set that was posted is intended for their build with an aftermarket crank and rods.

Full Throttle recommended reaching out to DSS for my goals.

JE and Diamond both quoted $1600 which is more than I was hoping for as this is a stock rod/crank street build.

I'm still waiting for DSS to provide a quote. My machinist recommended race tech and I have an RFQ out there.

I might have unrealistic expectations but I was hoping to have a more 'drop in' on a stock rod and crank piston under $1000. Full Throttle mentioned DSS is likely the place for what I want. My understanding is a JE or a Diamond is going to be a higher quality part but at my power level I don't need that extra strength.

At under $1000 it's worth building the 4.1 but at $1600 I'll just grab a 3.8 block and drop in a set of $400 speed pros.