GX340 & GX390 Performance Kit 5

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Home › Engine Parts › Honda / CLONE › Honda GX390 & Clone › GX340 & GX390 Performance Kit 5

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This kit includes our newly designed cylinder head, our dyno and track tested racing header, billet aluminum SFI approved flywheel, billet aluminum 7075 T-6 connecting rod with babbit bearings, Rev Roller Rocker arms, Parsons Racing camshaft design, Comp Cams pushrods, swirl polished stainless steel valves, racing valve springs, lash caps, retainers, and header bolts with safety wire. Get your kit now and move to the front of the field!
Don't forget our related products to complete your installation!

Specifications
Intake valve diameter	1.380"
Exhaust valve diameter	1.225"
Rocker arm ratio	1.3:1
Rod length	4.410"
Valve spring rate (closed)	55 lbs.
Pushrod diameter	1/4" od
Intake lobe lift	.283"
Intake lobe duration @ .050" cam lift	242 degrees
Intake valve lift (1.3:1 rocker)	.368"
Exhaust lobe lift	.283"
Exhaust lobe duration @ .050" cam lift	242 degrees
Exhaust valve lift (1.3:1 rocker)	.368"
Compression release	Yes

Features	Benefits
Billet aluminum connecting rod	7075 T-6 aircraft grade aluminum with babbit bearing inserts
Forced oiling dipper	As the connecting rod enters the crankcase oil it forces oil from the dipper into the bearing area
Roller rocker arms	Low inertia, higher lift, faster valve acceleration all great ingredients for making more power..so these rockers are the ticket!
Racing cylinder head	Our newly designed performance cylinder head package that incorporates a re-designed exhaust port flange area!
Performance exhaust header	This is our newly designed racing header for our cylinder head package...With a .990" id and 20" long it really pulls hard off the turn!
Increased rocker arm ratio	This increases the amount of valve lift and as a result increases torque and horsepower! These are the best rocker arms available!
Billet flywheel	Lightweight, low inertia, billet aluminum flywheel that is much safer and outperforms the stock flywheel! This will also increase your throttle response for that off the corner hole shot!
Performance valve springs	High quality, high tensile strength material that matches our camshaft selection!
Chrome moly pushrods	Made by the industry leader Comp Cams! These pushrods eliminate any unwanted pushrod flexing, which can rob power!
Racing cam profile	Our camshaft grind works great with our Rev Roller Rocker arms!