GX340 & GX390 Performance Kit 4

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Home › Engine Parts › Honda / CLONE › Honda GX390 & Clone › GX340 & GX390 Performance Kit 4

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This kit includes our billet aluminum Rev Roller Rockers, Parsons Racing header package, newly designed cylinder head, racing camshaft package, matching valve spring package, Comp Cams pushrods, swirl polished stainless steel valves and billet aluminum flywheel! Don't forget to look at our related products to complete your installation.

Specifications
Intake valve diameter	1.380"
Exhaust valve diameter	1.225"
Intake lobe lift	.283"
Intake valve lift (1.3:1 rocker)	.368"
Intake lobe duration @ .050" cam lift	242 degrees
Exhaust lobe lift	.283"
Exhaust valve lift (1.3:1 rocker)	.368"
Exhaust lobe duration @ .050" cam lift	242 degrees
Pushrod diameter	1/4" o.d.
Compression release	Yes

Features	Benefits
Roller rocker arms	Low inertia, higher lift, faster valve acceleration all great ingredients for making power and these rockers are just the ticket!
Cylinder head	High performance cylinder head package with a re-designed exhaust port flange!
Racing header	Our newly designed karting header, which features a 1/4" thick flange to eliminate warpage.
Increased rocker arm ratio	This increases the amount of valve lift and power from your engine! These are the ultimate rocker arms available!
Billet flywheel	Lightweight, low inertia, billet aluminum flywheel that is much safer and outperforms the stock flywheel by leaps and bounds..will also increase the throttle response of your engine!
Performance valve springs	High quality, high tensile strength material that matches our camshaft design profile!
Chrome moly pushrods	Made by the industry leader Comp Cams! These pushrods eliminate pushrod flexing that occurs with stock pushrods and will maintain the power throughout the rpm range.
Racing camshaft design	This camshaft profile works great with our 1.3:1 ratio roller rocker arms!